60th Legislative Assembly (2022–2026) |
| By-election | Incumbent | Party | Reason | Date | Winner | Party |
|---|
| Werribee | Tim Pallas | | Labor | Resigned | 8 February 2025 | John Lister | | Labor |
| Prahran | Sam Hibbins | | Independent | Resigned from parliament after leaving Greens | 8 February 2025 | Rachel Westaway | | Liberal |
| Mulgrave | Daniel Andrews | | Labor | Resigned as Premier | 18 November 2023 | Eden Foster | | Labor |
| Warrandyte | Ryan Smith | | Liberal | Resigned | 26 August 2023 | Nicole Werner | | Liberal |
| Narracan | Gary Blackwood | | Liberal | Supplementary election due to death of a candidate at the 2022 election. [1] | 28 January 2023 | Wayne Farnham | | Liberal |
59th Legislative Assembly (2018–2022) |
| No by-elections held |
58th Legislative Assembly (2014–2018) |
| By-election | Incumbent | Party | Reason | Date | Winner | Party |
|---|
| Northcote | Fiona Richardson | | Labor | Died | 18 November 2017 | Lidia Thorpe | | Greens |
| South-West Coast | Denis Napthine | | Liberal | Resigned | 31 October 2015 | Roma Britnell | | Liberal |
| Polwarth | Terry Mulder | | Liberal | Resigned | 31 October 2015 | Richard Riordan | | Liberal |
| Gippsland South | Peter Ryan | | National | Resigned | 14 March 2015 | Danny O'Brien | | National |
57th Legislative Assembly (2010–2014) |
| By-election | Incumbent | Party | Reason | Date | Winner | Party |
|---|
| Lyndhurst | Tim Holding | | Labor | Resigned | 27 April 2013 | Martin Pakula | | Labor |
| Melbourne | Bronwyn Pike | | Labor | Resigned | 21 July 2012 | Jennifer Kanis | | Labor |
| Niddrie | Rob Hulls | | Labor | Resigned | 24 March 2012 | Ben Carroll | | Labor |
| Broadmeadows | John Brumby | | Labor | Resigned following election loss | 19 February 2011 | Frank McGuire | | Labor |
56th Legislative Assembly (2006–2010) |
| By-election | Incumbent | Party | Reason | Date | Winner | Party |
|---|
| Altona | Lynne Kosky | | Labor | Resigned | 13 February 2010 | Jill Hennessy | | Labor |
| Kororoit | Andre Haermeyer | | Labor | Resigned | 28 June 2008 | Marlene Kairouz | | Labor |
| Williamstown | Steve Bracks | | Labor | Resigned as Premier | 15 September 2007 | Wade Noonan | | Labor |
| Albert Park | John Thwaites | | Labor | Resigned as Deputy Premier | 15 September 2007 | Martin Foley | | Labor |
55th Legislative Assembly (2002–2006) |
| No by-elections held |
54th Legislative Assembly (1999–2002) |
| By-election | Incumbent | Party | Reason | Date | Winner | Party |
|---|
| Benalla | Pat McNamara | | National | Resigned following election loss | 13 May 2000 | Denise Allen | | Labor |
| Burwood | Jeff Kennett | | Liberal | Resigned following election loss | 11 December 1999 | Bob Stensholt | | Labor |
| Frankston East | Peter McLellan | | Independent | Supplementary election due to death of the sitting member at the 1999 election. | 16 October 1999 | Matt Viney | | Labor |
53rd Legislative Assembly (1996–1999) |
| By-election | Incumbent | Party | Reason | Date | Winner | Party |
|---|
| Northcote | Tony Sheehan | | Labor | Resigned | 15 August 1998 | Mary Delahunty | | Labor |
| Mitcham | Roger Pescott | | Liberal | Resigned | 13 December 1997 | Tony Robinson | | Labor |
| Gippsland West | Alan Brown | | Liberal | Resigned | 1 February 1997 | Susan Davies | | Independent |
52nd Legislative Assembly (1992–1996) |
| By-election | Incumbent | Party | Reason | Date | Winner | Party |
|---|
| Williamstown | Joan Kirner | | Labor | Resigned | 13 August 1994 | Steve Bracks | | Labor |
| Coburg | Tom Roper | | Labor | Resigned | 14 May 1994 | Carlo Carli | | Labor |
| Broadmeadows | Jim Kennan | | Labor | Resigned | 18 September 1993 | John Brumby | | Labor |
51st Legislative Assembly (1988–1992) |
| By-election | Incumbent | Party | Reason | Date | Winner | Party |
|---|
| Shepparton | Peter Ross-Edwards | | National | Resigned | 19 October 1991 | Don Kilgour | | National |
| Thomastown | Beth Gleeson | | Labor | Died | 3 February 1990 | Peter Batchelor | | Labor |
| Greensborough | Pauline Toner | | Labor | Resigned due to ill health (cancer) | 15 April 1989 | Sherryl Garbutt | | Labor |
| Rodney | Eddie Hann | | National | Resigned | 4 March 1989 | Noel Maughan | | National |
50th Legislative Assembly (1985–1988) |
| By-election | Incumbent | Party | Reason | Date | Winner | Party |
|---|
| Ballarat North | Tom Evans | | Liberal | Resigned | 23 July 1988 | Steve Elder | | Liberal |
| Kew | Prue Sibree | | Liberal | Resigned | 19 March 1988 | Jan Wade | | Liberal |
49th Legislative Assembly (1982–1985) |
| By-election | Incumbent | Party | Reason | Date | Winner | Party |
|---|
| Swan Hill | Alan Wood | | Liberal | Resigned | 7 May 1983 | Barry Steggall | | National |
| Warrnambool | Ian Smith | | Liberal | Resigned in unsuccessful attempt to win Liberal preselection for the 1983 Wannon federal by-election even though he would have been required to resign if he had been successful at the preselection. | 7 May 1983 | Adam Kempton | | Liberal |
| Springvale | Kevin King | | Labor | Died | 19 March 1983 | Eddie Micallef | | Labor |
| Malvern | Lindsay Thompson | | Liberal | Resigned following defeat as Premier | 4 December 1982 | Geoff Leigh | | Liberal |
| Keilor | Jack Ginifer | | Labor | Resigned due to ill health | 17 July 1982 | George Seitz | | Labor |
48th Legislative Assembly (1979–1982) |
| By-election | Incumbent | Party | Reason | Date | Winner | Party |
|---|
| Kew | Rupert Hamer | | Liberal | Resigned following resignation as Premier | 15 August 1981 | Prue Sibree | | Liberal |
| Morwell | Derek Amos | | Labor | Resigned due to ill health | 27 June 1981 | Valerie Callister | | Labor |
47th Legislative Assembly (1976–1979) |
| By-election | Incumbent | Party | Reason | Date | Winner | Party |
|---|
| Richmond | Clyde Holding | | Labor | Resigned to enter federal politics at the 1977 federal election | 17 December 1977 | Theo Sidiropoulos | | Labor |
| Melbourne | Barry Jones | | Labor | Resigned to enter federal politics at the 1977 federal election | 17 December 1977 | Keith Remington | | Labor |
| Greensborough | Monte Vale | | Liberal | Died | 5 November 1977 | Pauline Toner | | Labor |
46th Legislative Assembly (1973–1976) |
| By-election | Incumbent | Party | Reason | Date | Winner | Party |
|---|
| Brunswick East | David Bornstein | | Labor | Resigned | 12 April 1975 | Ron McAlister | | Labor |
| Greensborough | Monte Vale | | Liberal | Result overturned by the Court of Disputed Returns | 13 October 1973 | Monte Vale | | Liberal |
45th Legislative Assembly (1970–1973) |
| By-election | Incumbent | Party | Reason | Date | Winner | Party |
|---|
| Hampden | Henry Bolte | | Liberal | Resigned as Premier | 7 October 1972 | Tom Austin | | Liberal |
| Melbourne | Arthur Clarey | | Labor | Died | 9 June 1972 | Barry Jones | | Labor |
| Gisborne | Julian Doyle | | Liberal | Resigned | 11 December 1971 | Athol Guy | | Liberal |
| Kew | Arthur Rylah | | Liberal | Resigned due to ill health | 17 April 1971 | Rupert Hamer | | Liberal |
44th Legislative Assembly (1967–1970) |
| By-election | Incumbent | Party | Reason | Date | Winner | Party |
|---|
| Dandenong | Len Reid | | Liberal | Resigned to enter federal politics at the 1969 federal election | 6 December 1969 | Alan Lind | | Labor |
| Swan Hill | Harold Stirling | | Country | Died | 14 September 1968 | Henry Broad | | Country |
43rd Legislative Assembly (1964–1967) |
| By-election | Incumbent | Party | Reason | Date | Winner | Party |
|---|
| Grant | Roy Crick | | Labor | Died | 8 October 1966 | Jack Ginifer | | Labor |
| Caulfield | Alexander Fraser | | Liberal | Died | 18 September 1965 | Ian McLaren | | Liberal |
42nd Legislative Assembly (1961–1964) |
| By-election | Incumbent | Party | Reason | Date | Winner | Party |
|---|
| Mildura | Nathaniel Barclay | | Country | Died | 27 October 1962 | Milton Whiting | | Country |
| Broadmeadows | Harry Kane | | Liberal and Country | Died | 4 August 1962 | John Wilton | | Labor |
| Richmond | Bill Towers | | Labor | Died | 12 May 1962 | Clyde Holding | | Labor |
41st Legislative Assembly (1958–1961) |
| By-election | Incumbent | Party | Reason | Date | Winner | Party |
|---|
| Ballarat North | Russell White | | Country | Resigned to take up position on the Trotting Control Board | 12 November 1960 | Tom Evans | | Liberal and Country |
| Scoresby | George Knox | | Liberal and Country | Died | 17 September 1960 | Bill Borthwick | | Liberal and Country |
| Footscray | Ernie Shepherd | | Labor | Died | 8 October 1958 | Bill Divers | | Labor |
40th Legislative Assembly (1955–1958) |
| By-election | Incumbent | Party | Reason | Date | Winner | Party |
|---|
| Northcote | John Cain | | Labor | Died | 21 September 1957 | Frank Wilkes | | Labor |
| Camberwell | Robert Whately | | Liberal and Country | Died in a car accident | 21 April 1956 | Vernon Wilcox | | Liberal and Country |
| Mornington | William Leggatt | | Liberal and Country | Resigned to take up appointment as Agent-General for Victoria in London | 3 March 1956 | Roberts Dunstan | | Liberal and Country |
| Flemington | Jack Holland | | Labor | Died | 18 February 1956 | Kevin Holland | | Labor |
39th Legislative Assembly (1952–1955) |
| By-election | Incumbent | Party | Reason | Date | Winner | Party |
|---|
| Malvern | Trevor Oldham | | Liberal and Country | Died | 11 July 1953 | John Bloomfield | | Liberal and Country |
38th Legislative Assembly (1950–1952) |
| By-election | Incumbent | Party | Reason | Date | Winner | Party |
|---|
| Toorak | Edward Reynolds | | Liberal and Country | Resigned | 13 September 1952 | Horace Petty | | Liberal and Country |
| Port Melbourne | Tom Corrigan | | Labor | Died | 13 September 1952 | Stan Corrigan | | Labor |
| Prahran | Frank Crean | | Labor | Resigned to enter federal politics at the 1951 federal election | 16 June 1951 | Robert Pettiona | | Labor |
| Ivanhoe | Rupert Curnow | | Liberal and Country | Died | 24 February 1951 | Frank Block | | Liberal and Country |
37th Legislative Assembly (1947–1950) |
| By-election | Incumbent | Party | Reason | Date | Winner | Party |
|---|
| Clifton Hill | Jack Cremean | | Labor | Resigned to enter federal politics at the 1949 federal election | 17 December 1949 | Joseph O'Carroll | | Labor |
| Kew | Wilfrid Kent Hughes | | Liberal and Country | Resigned to enter federal politics at the 1949 federal election | 17 December 1949 | Arthur Rylah | | Liberal and Country |
| Richmond | Stan Keon | | Labor | Resigned to enter federal politics at the 1949 federal election | 17 December 1949 | Frank Scully | | Labor |
| Brunswick | James Jewell | | Labor | Died | 16 July 1949 | Peter Randles | | Labor |
| Prahran | Bill Quirk | | Labor | Died | 22 January 1949 | Frank Crean | | Labor |
| Geelong | Fanny Brownbill | | Labor | Died | 13 November 1948 | Edward Montgomery | | Liberal |
| Toorak | Robert Bell Hamilton | | Liberal | Died | 19 June 1948 | Edward Reynolds | | Liberal |
36th Legislative Assembly (1945–1947) |
| By-election | Incumbent | Party | Reason | Date | Winner | Party |
|---|
| Collingwood | Tom Tunnecliffe | | Labor | Resigned | 20 September 1947 | Bill Towers | | Labor |
| Benambra | Roy Paton | | Country | Died | 7 June 1947 | Thomas Mitchell | | Country |
35th Legislative Assembly (1943–1945) |
| By-election | Incumbent | Party | Reason | Date | Winner | Party |
|---|
| Prahran | John Ellis | | United Australia | Died | 18 August 1945 | Bill Quirk | | Labor |
| Clifton Hill | Herbert Cremean | | Labor | Died | 7 July 1945 | Jack Cremean | | Labor |
| Bendigo | Arthur Cook | | Labor | Died | 26 May 1945 | Bill Galvin | | Labor |
| Lowan | Hamilton Lamb | | Country | Died in a Japanese prisoner of war camp on the Burma Railway | 4 November 1944 | Wilfred Mibus | | Country |
| Bulla and Dalhousie | Reginald James | | Country | Died | 27 September 1944 | Leslie Webster | | Country |
| Rodney | William Dunstone | | Country | Died | 12 April 1944 | Richard Brose | | Country |
| Waranga | Ernest Coyle | | Country | Died | 9 October 1943 | Wollaston Heily | | Country |
| Nunawading | Ivy Weber | | Independent | Resigned in unsuccessful attempt to enter federal politics at the 1943 federal election | 4 September 1943 | Bob Gray | | Labor |
34th Legislative Assembly (1940–1943) |
| By-election | Incumbent | Party | Reason | Date | Winner | Party |
|---|
| Maryborough and Daylesford | George Frost | | Labor | Died | 28 November 1942 | Clive Stoneham | | Labor |
| Gippsland North | Alexander Borthwick | | Country | Died | 20 June 1942 | Bill Fulton | | Country |
| Port Melbourne | James Murphy | | Labor | Died | 18 April 1942 | Tom Corrigan | | Labor |
| Toorak | Stanley Argyle | | United Australia | Died | 11 January 1941 | Harold Thonemann | | United Australia |
| Polwarth | Allan McDonald | | United Australia | Resigned to enter federal politics at the 1940 federal election | 2 Nov 1940 | Edward Guye | | Country |
| Coburg | Frank Keane | | Labor | Died | 13 July 1940 | Charlie Mutton | | Independent Labor |
33rd Legislative Assembly (1937–1940) |
| By-election | Incumbent | Party | Reason | Date | Winner | Party |
|---|
| Hawthorn | John Austin Gray | | United Australia | Died | 10 June 1939 | Les Tyack | | United Australia |
| Gippsland North | James Weir McLachlan | | Independent | Died | 5 November 1938 | Alexander Borthwick | | Country |
| Geelong | William Brownbill | | Labor | Died | 4 June 1938 | Fanny Brownbill | | Labor |
| Ouyen | Albert Bussau | | Country | Resigned to take up appointment as Agent-General for Victoria in London | 5 May 1938 | Keith Dodgshun | | Country |
32nd Legislative Assembly (1935–1937) |
| By-election | Incumbent | Party | Reason | Date | Winner | Party |
|---|
| Benalla | Edward Cleary | | Country | Died | 3 October 1936 | Frederick Cook | | Independent |
| Goulburn Valley | Murray Bourchier | | Country | Resigned to take up appointment as Agent-General for Victoria in London | 19 September 1936 | John MacDonald | | Country |
| Rodney | John Allan | | Country | Died | 18 April 1936 | William Dunstone | | Country |
| Allandale | Thomas Parkin | | United Australia | Died | 21 March 1936 | Patrick Denigan | | Labor |
31st Legislative Assembly (1932–1935) |
| By-election | Incumbent | Party | Reason | Date | Winner | Party |
|---|
| Nunawading | Robert Menzies | | United Australia | Resigned to enter federal politics at the 1934 federal election | 1 September 1934 | William Boyland | | United Australia |
| Clifton Hill | Maurice Blackburn | | Labor | Resigned to enter federal politics at the 1934 federal election | 20 August 1934 | Herbert Cremean | | Labor |
| Gunbower | Henry Angus | | United Australia | Died | 12 May 1934 | Norman Martin | | Independent Country |
| Allandale | Alexander Peacock | | United Australia | Died | 11 November 1933 | Millie Peacock | | United Australia |
| Warrnambool | James Fairbairn | | United Australia | Resigned to contest the 1933 Flinders federal by-election | 11 November 1933 | Keith McGarvie | | United Australia |
| Polwarth | James McDonald | | United Australia | Died | 16 September 1933 | Allan McDonald | | United Australia |
| Boroondara | Richard Linton | | United Australia | Resigned to take up appointment as Agent-General for Victoria in London | 29 April 1933 | Trevor Oldham | | United Australia |
| Benambra | Henry Beardmore | | United Australia | Died | 15 October 1932 | Roy Paton | | Country |
| Carlton | Robert Solly | | Labor | Died | 9 July 1932 | Bill Barry | | Labor |
30th Legislative Assembly (1929–1932) |
| By-election | Incumbent | Party | Reason | Date | Winner | Party |
|---|
| Caulfield | Frederick Forrest | | Australian Liberal | Died | 22 November 1930 | Harold Daniel Luxton | | Nationalist |
| Hawthorn | William Murray McPherson | | Nationalist | Resigned | 27 September 1930 | John Austin Gray | | Nationalist |
29th Legislative Assembly (1927–1929) |
| By-election | Incumbent | Party | Reason | Date | Winner | Party |
|---|
| Gippsland West | Arthur Walter | | Country | Resigned in unsuccessful bid for the federal seat of Indi at the 1929 election | 19 October 1929 | Matthew Bennett | | Country |
| Barwon | Edward Morley | | Nationalist | Died | 6 July 1929 | Thomas Maltby | | Nationalist |
| Castlemaine and Kyneton | Harry Lawson | | Nationalist | Resigned to contest a Senate seat at the 1929 federal election | 2 February 1929 | Walter Langslow | | Nationalist |
| Brighton | Oswald Snowball | | Nationalist | Died | 28 April 1928 | Ian MacFarlan | | Nationalist |
| Gippsland South | Henry Bodman | | Independent | Died | 3 December 1927 | Walter West | | Nationalist |
28th Legislative Assembly (1924–1927) |
| By-election | Incumbent | Party | Reason | Date | Winner | Party |
|---|
| Flemington | Edward Warde | | Labor | Died | 9 December 1925 | Jack Holland | | Labor |
| Fitzroy | John Billson | | Labor | Died | 4 February 1925 | Maurice Blackburn | | Labor |
| Glenelg | William Thomas | | Labor | Died | 14 August 1924 | Ernie Bond | | Labor |
27th Legislative Assembly (1921–1924) |
| By-election | Incumbent | Party | Reason | Date | Winner | Party |
|---|
| Gippsland West | Sir John Mackey | | Nationalist | Died | 23 May 1924 | Arthur Walter | | VFU |
| Dalhousie | Allan Cameron | | Nationalist | Died | 31 January 1924 | Reg Pollard | | Labor |
| Daylesford | Donald McLeod | | Nationalist | Died | 8 July 1923 | Roderick McLeod [1] | | Nationalist |
| Gippsland South | Thomas Livingston | | Nationalist | Died | 18 August 1922 | Walter West | | Nationalist |
26th Legislative Assembly (1920–1921) |
| By-election | Incumbent | Party | Reason | Date | Winner | Party |
|---|
| Upper Goulburn | Edwin Mackrell | | VFU | Disqualified (failed to nominate on time) | 27 January 1921 | Edwin Mackrell | | VFU |
25th Legislative Assembly (1917–1920) |
| By-election | Incumbent | Party | Reason | Date | Winner | Party |
|---|
| Swan Hill | Percy Stewart | | VFU | Resigned to enter federal politics at the 1919 federal election | 19 November 1919 | Francis Old | | VFU |
| Albert Park | Joseph Hannan | | Labor | Resigned to enter federal politics at the 1919 federal election | 19 November 1919 | Arthur Wallace | | Labor |
| Albert Park | George Elmslie | | Labor | Died | 13 June 1918 | Joseph Hannan | | Labor |
24th Legislative Assembly (1914–1917) |
| By-election | Incumbent | Party | Reason | Date | Winner | Party |
|---|
| Geelong | Robert Purnell | | Nationalist | Disqualified (April by-election declared void) | 17 August 1917 | Robert Purnell | | Nationalist |
| Polwarth | John Johnstone | | Nationalist | Resigned | 13 July 1917 | James McDonald | | Nationalist |
| Benambra | John Leckie | | Nationalist | Resigned | 20 April 1917 | Henry Beardmore | | Nationalist |
| Geelong | William Plain | | Nationalist | Resigned to contest a Senate seat at the 1917 federal election | 20 April 1917 | Robert Purnell | | Nationalist |
| Warrnambool | John Murray | | Commonwealth Liberal | Died | 1 June 1916 | James Deany | | Commonwealth Liberal |
| Port Melbourne | George Sangster | | Labor | Died | 28 April 1915 | Owen Sinclair | | Labor |
| Bendigo East | Alfred Hampson | | Labor | Resigned to enter federal politics at the 1915 Bendigo by-election | 4 February 1915 | Luke Clough | | Labor |
23rd Legislative Assembly (1911–1914) |
| By-election | Incumbent | Party | Reason | Date | Winner | Party |
|---|
| Essendon | William Watt | | Nationalist | Resigned to enter federal politics at the 1914 federal election | 23 July 1914 | Maurice Blackburn | | Labor |
| Gippsland South | Thomas Livingston | | Nationalist | Forfeited seat after joining Peacock Ministry | 30 June 1914 | Thomas Livingston | | Nationalist |
| Korong | Thomas Langdon | | Commonwealth Liberal | Died | 26 June 1914 | Achilles Gray | | Commonwealth Liberal |
| Borung | William Hutchinson | | Commonwealth Liberal | Forfeited seat after joining Watt Ministry | 15 January 1914 | William Hutchinson | | Commonwealth Liberal |
| Essendon | William Watt | | Commonwealth Liberal | Forfeited seat after forming Watt Ministry | 15 January 1914 | William Watt | | Commonwealth Liberal |
| Prahran | Donald Mackinnon | | Commonwealth Liberal | Forfeited seat after joining Watt Ministry | 15 January 1914 | Donald Mackinnon | | Commonwealth Liberal |
| Allandale | Alexander Peacock | | Commonwealth Liberal | Forfeited seat after joining Watt Ministry | 6 January 1914 | Alexander Peacock | | Commonwealth Liberal |
| Castlemaine and Maldon | Harry Lawson | | Commonwealth Liberal | Forfeited seat after joining Watt Ministry | 6 January 1914 | Harry Lawson | | Commonwealth Liberal |
| Warrnambool | John Murray | | Commonwealth Liberal | Forfeited seat after joining Watt Ministry | 6 January 1914 | John Murray | | Commonwealth Liberal |
| Benambra | Albert Craven | | Commonwealth Liberal | Died | 29 December 1913 | John Leckie | | Commonwealth Liberal |
| Albert Park | George Elmslie | | Labor | Forfeited seat after forming Elmslie Ministry | 20 December 1913 | George Elmslie | | Labor |
| Fitzroy | John Billson | | Labor | Forfeited seat after joining Elmslie Ministry | 20 December 1913 | John Billson | | Labor |
| Geelong | William Plain | | Labor | Forfeited seat after joining Elmslie Ministry | 20 December 1913 | William Plain | | Labor |
| Maryborough | Alfred Outtrim | | Labor | Forfeited seat after joining Elmslie Ministry | 20 December 1913 | Alfred Outtrim | | Labor |
| North Melbourne | George Prendergast | | Labor | Forfeited seat after joining Elmslie Ministry | 20 December 1913 | George Prendergast | | Labor |
| Williamstown | John Lemmon | | Labor | Forfeited seat after joining Elmslie Ministry | 20 December 1913 | John Lemmon | | Labor |
| Hawthorn | George Swinburne | | Commonwealth Liberal | Resigned to join the Inter-State Commission | 5 September 1913 | William McPherson | | Commonwealth Liberal |
| Grenville | Charles McGrath | | Labor | Resigned to contest the federal seat of Ballaraat at the 1913 election | 15 May 1913 | John Chatham | | Labor |
| Kara Kara | Peter McBride | | | Resigned to take up appointment as Agent-General for Victoria in London | 14 March 1913 | Jack Pennington | | Commonwealth Liberal |
| Allandale | Alexander Peacock | | Commonwealth Liberal | Forfeited seat after joining Watt Ministry | 6 March 1913 | Alexander Peacock | | Commonwealth Liberal |
| Warrenheip | George Holden | | | Resigned to become chairman of the Melbourne Harbor Trust | 28 February 1913 | Ned Hogan | | Labor |
| East Melbourne | Alfred Farthing | | Commonwealth Liberal | Election declared void | 1 October 1912 | Alfred Farthing | | Commonwealth Liberal |
| Abbotsford | William Beazley | | Labor | Died | 26 July 1912 | Gordon Webber | | Labor |
22nd Legislative Assembly (1908–1911) |
| By-election | Incumbent | Party | Reason | Date | Winner | Party |
|---|
| Waranga | Martin Cussen | | | Died | 25 August 1911 | John Gordon | | |
| Bendigo East | Thomas Glass | | Labor | Died | 16 June 1911 | Alfred Hampson | | Labor |
| Walhalla | Albert Harris | | | Died | 29 July 1910 | Samuel Barnes | | |
| Brunswick | Frank Anstey | | Labor | Resigned to contest the federal seat of Bourke at the 1910 election | 14 March 1910 | James Jewell | | Labor |
| Brighton | Sir Thomas Bent | | Commonwealth Liberal | Died | 8 October 1909 | Oswald Snowball | | Commonwealth Liberal |
| Goulburn Valley | George Graham | | Commonwealth Liberal | Forfeited seat after joining Murray Ministry | 29 January 1909 | George Graham | | Commonwealth Liberal |
| Kara Kara | Peter McBride | | Commonwealth Liberal | Forfeited seat after joining Murray Ministry | 29 January 1909 | Peter McBride | | Commonwealth Liberal |
| Ovens | Alfred Billson | | Commonwealth Liberal | Forfeited seat after joining Murray Ministry | 29 January 1909 | Alfred Billson | | Commonwealth Liberal |
| Rodney | Hugh McKenzie | | Commonwealth Liberal | Forfeited seat after joining Murray Ministry | 29 January 1909 | Hugh McKenzie | | Commonwealth Liberal |
| Warrnambool | John Murray | | Commonwealth Liberal | Forfeited seat after forming Murray Ministry | 29 January 1909 | John Murray | | Commonwealth Liberal |
21st Legislative Assembly (1907–1908) |
| By-election | Incumbent | Party | Reason | Date | Winner | Party |
|---|
| Mornington | Alfred Downward | | | Forfeited seat after joining Bent Ministry | 17 November 1908 | Alfred Downward | | |
| Upper Goulburn | Thomas Hunt | | | Forfeited seat after joining Bent Ministry | 17 November 1908 | Thomas Hunt | | |
| Wangaratta | John Bowser | | | Forfeited seat after joining Bent Ministry | 17 November 1908 | John Bowser | | |
| Carlton | Frederick Bromley | | Labor | Died | 23 October 1908 | Robert Solly | | Labor |
| Richmond | George Bennett | | United Liberal | Died | 2 October 1908 | Ted Cotter | | Labor |
20th Legislative Assembly (1904–1907) |
| By-election | Incumbent | Party | Reason | Date | Winner | Party |
|---|
| Public Officers | David Gaunson | | Labor | resignation | 1 February 1907 | John Carter | | |
| Korong | Thomas Langdon | | United Liberal | Forfeited seat after joining Bent Ministry | 25 January 1907 | Thomas Langdon | | United Liberal |
| East Melbourne | Samuel Gillott | | United Liberal | Resigned due to ill health | 8 January 1907 | Henry Weedon | | |
| Toorak | George Fairbairn | | Ministerialist | Resigned to enter federal politics at the 1906 federal election | 10 October 1906 | Norman Bayles | | Independent Ministerialist |
| Gippsland West | John Mackey | | | Forfeited seat after joining Bent Ministry | 29 August 1906 | John Mackey | | |
| Lowan | William Irvine | | | Resigned to enter federal politics at the 1906 federal election | 20 July 1906 | Robert Stanley | | |
| Barwon | Jonas Levien | | | Died | 15 June 1906 | James Farrer | | |
| Glenelg | Ewen Cameron | | | Died | 11 May 1906 | Hugh Campbell | | |
19th Legislative Assembly (1902–1904) |
| By-election | Incumbent | Party | Reason | Date | Winner | Party |
|---|
| Donald and Swan Hill | John Taverner | | | Resigned to take up appointment as Agent-General for Victoria in London | 9 March 1904 | James Meldrum | | |
| Daylesford | Donald McLeod | | | Forfeited seat after joining Bent Ministry | 27 February 1904 | Donald McLeod | | |
| Melbourne East | Samuel Gillott | | | Forfeited seat after joining Bent Ministry | 27 February 1904 | Samuel Gillott | | |
| East Bourke Boroughs | Frederick Hickford | | | Resigned to contest a House seat at the 1903 federal election | 21 December 1903 | David Methven | | |
| Richmond | William Trenwith | | | Resigned to enter federal politics at the 1903 federal election | 21 December 1903 | George Roberts | | Labor |
| Villiers and Heytesbury | Gratton Wilson | | | Resigned to enter federal politics at the 1903 federal election | 21 December 1903 | John Glasgow | | |
| Mandurang | Maximilian Hirsch | | | Resigned to contest a House seat at the 1903 federal election | 15 December 1903 | William Webb | | |
| Melbourne West | William Maloney | | | Resigned to enter federal politics at the 1903 federal election | 15 December 1903 | Tom Tunnecliffe | | Labor |
| Toorak | Duncan Gillies | | | Died | 9 October 1903 | George Fairbairn | | |
| Bourke West | Samuel Staughton Jr. | | | Died | 6 March 1903 | Andrew Robertson | | |
| Benalla and Yarrawonga | William Hall | | | Died | 25 May 1903 | John Carlisle | | |
| Anglesey | Malcolm McKenzie | | | Resigned | 6 March 1903 | Thomas Hunt | | |
18th Legislative Assembly (1900–1902) |
| By-election | Incumbent | Party | Reason | Date | Winner | Party |
|---|
| Gippsland East | Henry Foster | | | Died | 27 June 1902 | James Cameron | | |
| Anglesey | Malcolm McKenzie | | | Forfeited seat after joining the Irvine Ministry | 18 June 1902 | Malcolm McKenzie | | |
| Brighton | Thomas Bent | | | Forfeited seat after joining the Irvine Ministry | 18 June 1902 | Thomas Bent | | |
| Donald and Swan Hill | John Taverner | | | Forfeited seat after joining the Irvine Ministry | 18 June 1902 | John Taverner | | |
| Evelyn | Ewen Cameron | | | Forfeited seat after joining the Irvine Ministry | 18 June 1902 | Ewen Cameron | | |
| Lowan | William Irvine | | | Forfeited seat after forming the Irvine Ministry | 18 June 1902 | William Irvine | | |
| Normanby | William Shiels | | | Forfeited seat after joining the Irvine Ministry | 18 June 1902 | William Shiels | | |
| Warrnambool | John Murray | | | Forfeited seat after joining the Irvine Ministry | 18 June 1902 | John Murray | | |
| Footscray | Jacob Fotheringham | | | Resigned | 14 June 1902 | Alexander McDonald | | |
| Bourke West | Samuel Staughton Sr. | | | Died | 14 September 1901 | Samuel Staughton Jr. | | |
| Melbourne East | John Anderson | | | Died | 16 July 1901 | John Deegan | | |
| Melbourne | Edward Findley | | Labor | Expelled for seditious libel | 16 July 1901 | James Boyd | | Conservative |
| Bogong | Isaac Isaacs | | | Resigned to enter federal politics at the 1901 federal election | 24 June 1901 | Alfred Billson | | |
| Benalla and Yarrawonga | Thomas Kennedy | | | Resigned to enter federal politics at the 1901 federal election | 17 June 1901 | William Hall | | |
| Fitzroy | Robert Best | | | Resigned to enter federal politics at the 1901 federal election | 17 June 1901 | Patrick O'Connor | | |
| Footscray | Samuel Mauger | | | Resigned to enter federal politics at the 1901 federal election | 17 June 1901 | Jacob Fotheringham | | |
| Gippsland North | Allan McLean | | | Resigned to enter federal politics at the 1901 federal election | 17 June 1901 | Hubert Keogh | | |
| Gunbower | James McColl | | | Resigned to enter federal politics at the 1901 federal election | 17 June 1901 | John Cullen | | |
| Talbot and Avoca | Carty Salmon | | | Resigned to enter federal politics at the 1901 federal election | 17 June 1901 | George Mitchell | | |
| Melbourne East | Samuel Gillott | | | Forfeited seat after joining the Second Turner Ministry | 11 February 1901 | Samuel Gillott | | |
| St Kilda | George Turner | | | Resigned to enter federal politics at the 1901 federal election | 11 February 1901 | William Williams | | |
| St Kilda | George Turner | | | Forfeited seat after forming the Second Turner Ministry | 3 December 1900 | George Turner | | |
| Bogong | Isaac Isaacs | | | Forfeited seat after joining the Second Turner Ministry | 3 December 1900 | Isaac Isaacs | | |
| Clunes and Allandale | Alexander Peacock | | | Forfeited seat after joining the Second Turner Ministry | 27 November 1900 | Alexander Peacock | | |
| Dunolly | Daniel Joseph Duggan | | | Forfeited seat after joining the Second Turner Ministry | 27 November 1900 | Daniel Joseph Duggan | | |
| Geelong | William Gurr | | | Forfeited seat after joining the Second Turner Ministry | 27 November 1900 | William Gurr | | |
| Richmond | William Trenwith | | | Forfeited seat after joining the Second Turner Ministry | 27 November 1900 | William Trenwith | | |
| Rodney | John Morrissey | | | Forfeited seat after joining the Second Turner Ministry | 27 November 1900 | John Morrissey | | |
| Stawell | John Burton | | | Forfeited seat after joining the Second Turner Ministry | 27 November 1900 | John Burton | | |
17th Legislative Assembly (1897–1900) |
| By-election | Incumbent | Party | Reason | Date | Winner | Party |
|---|
| Warrenheip | Edward Murphy | | | Died | 11 May 1900 | George Holden | | |
| Grenville | George Russell | | | Resigned | 11 April 1900 | James Sadler | | |
| Talbot and Avoca | Carty Salmon | | | Forfeited seat after joining the McLean Ministry | 9 January 1900 | Carty Salmon | | |
| Castlemaine | James McCay | | | Forfeited seat after joining the McLean Ministry | 20 December 1899 | James McCay | | |
| Melbourne North | William Watt | | | Forfeited seat after joining the McLean Ministry | 20 December 1899 | William Watt | | |
| Gunbower | James McColl | | | Forfeited seat after joining the McLean Ministry | 13 December 1899 | James McColl | | |
| Gippsland North | Allan McLean | | | Forfeited seat after forming the McLean Ministry | 13 December 1899 | Allan McLean | | |
| Lowan | William Irvine | | | Forfeited seat after joining the McLean Ministry | 13 December 1899 | William Irvine | | |
| Maryborough | Alfred Outtrim | | | Forfeited seat after joining the McLean Ministry | 13 December 1899 | Alfred Outtrim | | |
| Normanby | William Shiels | | | Forfeited seat after joining the McLean Ministry | 13 December 1899 | William Shiels | | |
| Numurkah and Nathalia | George Graham | | | Forfeited seat after joining the McLean Ministry | 13 December 1899 | George Graham | | |
| Footscray | John Hancock | | | Died | 12 December 1899 | Samuel Mauger | | |
| Grenville | Michael Stapleton | | | Died | 1 December 1899 | David Kerr | | |
| Melbourne East | Ephraim Zox | | | Died | 7 November 1899 | Samuel Gillott | | |
| Windermere | William Anderson | | | Died | 3 June 1898 | John Spiers | | |
16th Legislative Assembly (1894–1897) |
| By-election | Incumbent | Party | Reason | Date | Winner | Party |
|---|
| Kara Kara | Andrew Anderson | | | Died | 11 May 1897 | Peter McBride | | |
| Melbourne South | Joseph Winter | | | Died | 26 May 1896 | John Tucker | | |
| Villiers and Heytesbury | Thomas Scott | | | Resigned | 26 May 1896 | John McArthur | | |
| Castlemaine | James Patterson | | | Died | 19 November 1895 | James McCay | | |
| Mornington | Alfred Downward | | | Election declared void | 26 January 1895 | Alfred Downward | | |
| Ballarat West | William Smith | | | Died | 5 November 1894 | Joseph Kirton | | |
| Carlton South | William Ievers | | | Died | 5 November 1894 | John Barrett | | |
| Bogong | Isaac Isaacs | | | Forfeited seat after joining the First Turner Ministry | 9 October 1894 | Isaac Isaacs | | |
| Clunes and Allandale | Alexander Peacock | | | Forfeited seat after joining the First Turner Ministry | 3 October 1894 | Alexander Peacock | | |
| Donald and Swan Hill | John Taverner | | | Forfeited seat after joining the First Turner Ministry | 3 October 1894 | John Taverner | | |
| Eaglehawk | Henry Williams | | | Forfeited seat after joining the First Turner Ministry | 3 October 1894 | Henry Williams | | |
| Fitzroy | Robert Best | | | Forfeited seat after joining the First Turner Ministry | 3 October 1894 | Robert Best | | |
| Gippsland East | Henry Foster | | | Forfeited seat after joining the First Turner Ministry | 3 October 1894 | Henry Foster | | |
| Kilmore, Dalhousie and Lancefield | John Duffy | | | Forfeited seat after joining the First Turner Ministry | 3 October 1894 | John Duffy | | |
| St Kilda | George Turner | | | Forfeited seat after forming the First Turner Ministry | 3 October 1894 | George Turner | | |
15th Legislative Assembly (1892–1894) |
| By-election | Incumbent | Party | Reason | Date | Winner | Party |
|---|
| Portland | Henry Wrixon | | | Resigned | 24 July 1894 | Donald McLeod | | |
| Grenville | David Davies | | | Died | 14 July 1894 | George Russell | | |
| Eastern Suburbs | Duncan Gillies | | | Resigned to take up appointment as Agent-General for Victoria in London | 25 January 1894 | Frank Madden | | |
| Windermere | Matthew Butterley | | | Died | 25 January 1894 | William Anderson | | |
| Talbot and Avoca | Robert Bowman | | | Died | 29 December 1893 | Carty Salmon | | |
| Benalla and Yarrawonga | John Templeton | | | Election declared void | 20 November 1893 | Thomas Kennedy | | |
| Benalla and Yarrawonga | James Campbell | | | Died | 9 October 1893 | John Templeton | | |
| Lowan | Richard Baker | | | Forfeited seat after joining the Patterson Ministry | 9 October 1893 | Richard Baker | | |
| Sandhurst | Robert Burrowes | | | Died | 6 October 1893 | Daniel Lazarus | | |
| Creswick | Richard Richardson | | | Forfeited seat after joining the Patterson Ministry | 28 August 1893 | Richard Richardson | | |
| Mandurang | John Highett | | | Died | 10 July 1893 | Richard O'Neill | | |
| Bogong | Isaac Isaacs | | | Resigned | 6 June 1893 | Isaac Isaacs | | |
| Melbourne North | David Wyllie | | | Died | 5 June 1893 | Sylvanus Reynolds | | |
| Benalla and Yarrawonga | James Campbell | | | Forfeited seat after joining the Patterson Ministry | 31 January 1893 | James Campbell | | |
| Bogong | Isaac Isaacs | | | Forfeited seat after joining the Patterson Ministry | 31 January 1893 | Isaac Isaacs | | |
| Castlemaine | James Patterson | | | Forfeited seat after forming the Patterson Ministry | 31 January 1893 | James Patterson | | |
| Gunbower | James McColl | | | Forfeited seat after joining the Patterson Ministry | 31 January 1893 | James McColl | | |
| Kara Kara | John Dow | | | Resigned due to insolvency | 31 January 1893 | John Dow | | |
| Maldon | John McIntyre | | | Forfeited seat after joining the Patterson Ministry | 31 January 1893 | John McIntyre | | |
| Melbourne | Godfrey Carter | | | Forfeited seat after joining the Patterson Ministry | 31 January 1893 | Godfrey Carter | | |
| Port Fairy | Bryan O'Loghlen | | | Forfeited seat after joining the Patterson Ministry | 31 January 1893 | Bryan O'Loghlen | | |
| Rodney | William Webb | | | Forfeited seat after joining the Patterson Ministry | 31 January 1893 | William Webb | | |
| Dundas | Samuel Samuel | | | Died | 18 August 1892 | John Thomson | | |
| East Bourke Boroughs | Graham Berry | | | Forfeited seat after joining the Shiels Ministry | 3 May 1892 | Graham Berry | | |
14th Legislative Assembly (1889–1892) |
| By-election | Incumbent | Party | Reason | Date | Winner | Party |
|---|
| Benalla and Yarrawonga | John Brock | | | Resigned | 2 April 1892 | Charles Kerville | | |
| Geelong | James Munro | | | Resigned to take up appointment as Agent-General for Victoria in London | 2 April 1892 | John Hopkins | | |
| Clunes and Allandale | Alexander Peacock | | | Forfeited seat after joining the Shiels Ministry | 3 March 1892 | Alexander Peacock | | |
| Bourke East | William Wilkinson | | | Died | 27 August 1891 | Robert Harper | | |
| St Kilda | George Turner | | | Forfeited seat after joining the Munro Ministry | 7 May 1891 | George Turner | | |
| Collingwood | George Langridge | | | Died | 17 April 1891 | John Hancock | | |
| Collingwood | George Langridge | | | Forfeited seat after joining the Munro Ministry | 20 November 1890 | George Langridge | | |
| Daylesford | James Wheeler | | | Forfeited seat after joining the Munro Ministry | 20 November 1890 | James Wheeler | | |
| Geelong | James Munro | | | Forfeited seat after forming the Munro Ministry | 20 November 1890 | James Munro | | |
| Gippsland North | Allan McLean | | | Forfeited seat after joining the Munro Ministry | 20 November 1890 | Allan McLean | | |
| Kilmore, Dalhousie and Lancefield | John Duffy | | | Forfeited seat after joining the Munro Ministry | 20 November 1890 | John Duffy | | |
| Maryborough | Alfred Outtrim | | | Forfeited seat after joining the Munro Ministry | 20 November 1890 | Alfred Outtrim | | |
| Normanby | William Shiels | | | Forfeited seat after joining the Munro Ministry | 20 November 1890 | William Shiels | | |
| Numurkah and Nathalia | George Graham | | | Forfeited seat after joining the Munro Ministry | 20 November 1890 | George Graham | | |
| Kara Kara | John Dow | | | Forfeited seat after joining the Gillies Ministry | 17 September 1890 | John Dow | | |
| Villiers and Heytesbury | William Anderson | | | Forfeited seat after joining the Gillies Ministry | 17 September 1890 | William Anderson | | |
| Dunolly | James Cheetham | | | Died | 22 July 1890 | William Tatchell | | |
| Talbot and Avoca | James Stewart | | | Died | 4 December 1889 | Robert Bowman | | |
| Ballarat East | James Russell | | | Died | 8 November 1889 | John Dunn | | |
13th Legislative Assembly (1886–1889) |
| By-election | Incumbent | Party | Reason | Date | Winner | Party |
|---|
| Belfast | John Madden | | | Died | 2 February 1888 | Bryan O'Loghlen | | |
| Williamstown | Alfred Clark | | | Resigned | 2 November 1887 | James Mirams | | |
| Dalhousie | George Sands | | | Died | 25 March 1887 | John Duffy | | |
| Benambra | Peter Wallace | | | Died | 15 June 1886 | Peter Wright | | |
12th Legislative Assembly (1883–1886) |
| By-election | Incumbent | Party | Reason | Date | Winner | Party |
|---|
| Ovens | George Kerferd | | | Resigned to take up appointment on the Supreme Court of Victoria | 15 January 1886 | Ferguson Tuthill | | |
| Maryborough and Talbot | Robert Bowman | | | Resigned | 22 December 1885 | Alfred Outtrim | | |
| Melbourne West | James Orkney | | | Resigned | 30 October 1885 | Godfrey Carter | | |
| Avoca | James Grant | | | Died | 24 April 1885 | George Bourchier | | |
| Mandurang | Hugh McColl | | | Died | 24 April 1885 | John Highett | | |
| Moira | Henry Bolton | | | Resigned | 2 May 1884 | George Graham | | |
| Warrnambool | James Francis | | | Died | 15 February 1884 | John Murray | | |
| Emerald Hill | Robert MacGregor | | | Died | 9 October 1883 | David Gaunson | | |
| Sandhurst | Robert Clark | | | Died | 15 May 1883 | Angus Mackay | | |
| Barwon | Jonas Levien | | | Forfeited seat after joining the Second Service Ministry | 24 March 1883 | Jonas Levien | | |
| Bourke West | Alfred Deakin | | | Forfeited seat after joining the Second Service Ministry | 24 March 1883 | Alfred Deakin | | |
| Castlemaine | James Service | | | Forfeited seat after forming the Second Service Ministry | 24 March 1883 | James Service | | |
| Collingwood | George Langridge | | | Forfeited seat after joining the Second Service Ministry | 24 March 1883 | George Langridge | | |
| Fitzroy | Albert Tucker | | | Forfeited seat after joining the Second Service Ministry | 24 March 1883 | Albert Tucker | | |
| Geelong | Graham Berry | | | Forfeited seat after joining the Second Service Ministry | 24 March 1883 | Graham Berry | | |
| Ovens | George Kerferd | | | Forfeited seat after joining the Second Service Ministry | 24 March 1883 | George Kerferd | | |
| Rodney | Duncan Gillies | | | Forfeited seat after joining the Second Service Ministry | 24 March 1883 | Duncan Gillies | | |
| Melbourne North | James Rose | | | Resigned | 21 March 1883 | James Rose | | |
11th Legislative Assembly (1880–1883) |
| By-election | Incumbent | Party | Reason | Date | Winner | Party |
|---|
| Bourke East | Robert Ramsay | | | Died | 13 June 1882 | Robert Harper | | |
| Geelong | Charles Kernot | | | Died | 18 April 1882 | Joseph Connor | | |
| Boroondara | Robert Smith | | | Resigned to take up appointment as Agent-General for Victoria in London | 23 February 1882 | William Walker | | |
| Geelong | Robert Johnstone | | | Died | 8 December 1881 | Robert Johnstone | | |
| Fitzroy | William Vale | | | Resigned | 6 December 1881 | Cuthbert Blackett | | |
| Sandhurst | Robert Burrowes | | | Forfeited seat after joining the O'Loghlen Ministry | 6 September 1881 | Robert Burrowes | | |
| Wimmera | Walter Madden | | | Forfeited seat after joining the O'Loghlen Ministry | 6 September 1881 | Walter Madden | | |
| Polwarth and South Grenville | William O'Hea | | | Died | 5 August 1881 | William Robertson | | |
| Ararat | David Gaunson | | | Forfeited seat after joining the O'Loghlen Ministry | 26 July 1881 | David Gaunson | | |
| Avoca | James Grant | | | Forfeited seat after joining the O'Loghlen Ministry | 26 July 1881 | James Grant | | |
| Bourke West | Bryan O'Loghlen | | | Forfeited seat after forming the O'Loghlen Ministry | 26 July 1881 | Bryan O'Loghlen | | |
| Brighton | Thomas Bent | | | Forfeited seat after joining the O'Loghlen Ministry | 26 July 1881 | Thomas Bent | | |
| Delatite | James Graves | | | Forfeited seat after joining the O'Loghlen Ministry | 26 July 1881 | James Graves | | |
| Kyneton Boroughs | Charles Young | | | Forfeited seat after joining the O'Loghlen Ministry | 26 July 1881 | Charles Young | | |
| Moira | Henry Bolton | | | Forfeited seat after joining the O'Loghlen Ministry | 26 July 1881 | Henry Bolton | | |
| Melbourne North | Joseph Storey | | | Died | 8 April 1881 | James Munro | | |
| Maldon | James Service | | | Resigned | 18 March 1881 | John McIntyre | | |
| Melbourne East | Alexander Smith | | | Died | 8 February 1881 | Frederick Walsh | | |
| Ballarat West | William Smith | | | Forfeited seat after joining the Third Berry Ministry | 18 August 1880 | William Smith | | |
| Castlemaine | James Patterson | | | Forfeited seat after joining the Third Berry Ministry | 18 August 1880 | James Patterson | | |
| Collingwood | George Langridge | | | Forfeited seat after joining the Third Berry Ministry | 18 August 1880 | George Langridge | | |
| Creswick | Richard Richardson | | | Forfeited seat after joining the Third Berry Ministry | 18 August 1880 | Richard Richardson | | |
| Fitzroy | William Vale | | | Forfeited seat after joining the Third Berry Ministry | 18 August 1880 | William Vale | | |
| Geelong | Graham Berry | | | Forfeited seat after forming the Third Berry Ministry | 18 August 1880 | Graham Berry | | |
| Mandurang | Henry Williams | | | Forfeited seat after joining the Third Berry Ministry | 18 August 1880 | Henry Williams | | |
| Williamstown | Alfred Clark | | | Forfeited seat after joining the Third Berry Ministry | 18 August 1880 | Alfred Clark | | |
10th Legislative Assembly (1880) |
| By-election | Incumbent | Party | Reason | Date | Winner | Party |
|---|
| Bourke East | Robert Ramsay | | | Forfeited seat after joining the First Service Ministry | 19 March 1880 | Robert Ramsay | | |
| Brighton | Thomas Bent | | | Forfeited seat after joining the First Service Ministry | 19 March 1880 | Thomas Bent | | |
| Dalhousie | John Duffy | | | Forfeited seat after joining the First Service Ministry | 19 March 1880 | John Duffy | | |
| Maldon | James Service | | | Forfeited seat after forming the First Service Ministry | 19 March 1880 | James Service | | |
| Ovens | George Kerferd | | | Forfeited seat after joining the First Service Ministry | 19 March 1880 | George Kerferd | | |
| Rodney | Duncan Gillies | | | Forfeited seat after joining the First Service Ministry | 19 March 1880 | Duncan Gillies | | |
| Sandhurst | Robert Clark | | | Forfeited seat after joining the First Service Ministry | 19 March 1880 | Robert Clark | | |
| Sandridge | John Madden | | | Forfeited seat after joining the First Service Ministry | 19 March 1880 | John Madden | | |
9th Legislative Assembly (1877–1880) |
| By-election | Incumbent | Party | Reason | Date | Winner | Party |
|---|
| Villiers and Heytesbury | Jeremiah Dwyer | | | Declared Insolvent | 16 December 1879 | Joseph Jones | | |
| Carlton | James Munro | | | Resigned | 2 December 1879 | James Munro | | |
| Bourke West | Alfred Deakin | | | Resigned | 22 August 1879 | Robert Harper | | |
| Melbourne East | Ephraim Zox | | | Resigned | 1 July 1879 | Ephraim Zox | | |
| Fitzroy | Robert MacGregor | | | Resigned | 25 June 1879 | Cuthbert Blackett | | |
| Footscray | Mark Last King | | | Died | 4 March 1879 | William Clark | | |
| Bourke West | John Smith | | | Died | 18 February 1879 | Alfred Deakin | | |
| Dundas | John MacPherson | | | Resigned | 29 July 1878 | John Serjeant | | |
| Gippsland South | George Macartney | | | Died | 19 June 1878 | Francis Mason | | |
| Castlemaine | James Farrell | | | Resigned | 7 June 1878 | Charles Pearson | | |
| Warrnambool | James McCulloch | | | Resigned | 21 May 1878 | James Francis | | |
| Melbourne West | Bryan O'Loghlen | | | Forfeited seat after joining the Second Berry Ministry | 11 April 1878 | Bryan O'Loghlen | | |
| Melbourne West | Charles MacMahon | | | Resigned | 4 February 1878 | Bryan O'Loghlen | | |
| Boroondara | George Smith | | | Died | 24 December 1877 | Robert Smith | | |
| Rodney | Duncan Gillies | | | Election declared void | 2 November 1877 | Duncan Gillies | | |
| Gippsland South | George Macartney | | | Election declared void | 24 August 1877 | George Macartney | | |
| Sandhurst | W. G. Blackham | | | Election declared void | 25 July 1877 | Angus Mackay | | |
| Avoca | James Grant | | | Forfeited seat after joining the Second Berry Ministry | 7 June 1877 | James Grant | | |
| Ballarat West | William Smith | | | Forfeited seat after joining the Second Berry Ministry | 7 June 1877 | William Smith | | |
| Castlemaine | James Patterson | | | Forfeited seat after joining the Second Berry Ministry | 7 June 1877 | James Patterson | | |
| Geelong | Graham Berry | | | Forfeited seat after forming the Second Berry Ministry | 7 June 1877 | Graham Berry | | |
| Grant | Peter Lalor | | | Forfeited seat after joining the Second Berry Ministry | 7 June 1877 | Peter Lalor | | |
| Ripon and Hampden | Francis Longmore | | | Forfeited seat after joining the Second Berry Ministry | 7 June 1877 | Francis Longmore | | |
| Stawell | John Woods | | | Forfeited seat after joining the Second Berry Ministry | 7 June 1877 | John Woods | | |
8th Legislative Assembly (1874–1877) |
| By-election | Incumbent | Party | Reason | Date | Winner | Party |
|---|
| Gippsland North | James McKean | | | Expelled | 17 August 1876 | Charles Duffy | | |
| Sandridge | David Thomas | | | Died | 27 July 1876 | John Madden | | |
| Geelong East | John Richardson | | | Died | 29 March 1876 | Charles Kernot | | |
| Collingwood | James Sullivan | | | Died | 22 February 1876 | James Mirams | | |
| East Bourke Boroughs | George Higinbotham | | | Resigned | 10 February 1876 | William Cook | | |
| Villiers and Heytesbury | Michael O'Grady | | | Died | 27 January 1876 | Joseph Jones | | |
| Bourke East | Robert Ramsay | | | Forfeited seat after joining the Fourth McCulloch Ministry | 8 November 1875 | Robert Ramsay | | |
| Bourke West | John Madden | | | Forfeited seat after joining the Fourth McCulloch Ministry | 8 November 1875 | Mark King | | |
| Ballarat West | Joseph Jones | | | Forfeited seat after joining the Fourth McCulloch Ministry | 6 November 1875 | George Fincham | | |
| Warrnambool | James McCulloch | | | Forfeited seat after forming the Fourth McCulloch Ministry | 6 November 1875 | James McCulloch | | |
| Ararat | William McLellan | | | Forfeited seat after joining the Fourth McCulloch Ministry | 2 November 1875 | William McLellan | | |
| Dundas | John MacPherson | | | Forfeited seat after joining the Fourth McCulloch Ministry | 2 November 1875 | John MacPherson | | |
| Maryborough | Duncan Gillies | | | Forfeited seat after joining the Fourth McCulloch Ministry | 2 November 1875 | Duncan Gillies | | |
| Ovens | George Kerferd | | | Forfeited seat after joining the Fourth McCulloch Ministry | 2 November 1875 | George Kerferd | | |
| Avoca | James Grant | | | Forfeited seat after joining the First Berry Ministry | 20 August 1875 | James Grant | | |
| Ballarat West | William Smith | | | Forfeited seat after joining the First Berry Ministry | 20 August 1875 | William Smith | | |
| Castlemaine | James Patterson | | | Forfeited seat after joining the First Berry Ministry | 20 August 1875 | James Patterson | | |
| Crowlands | John Woods | | | Forfeited seat after joining the First Berry Ministry | 20 August 1875 | John Woods | | |
| Geelong West | Graham Berry | | | Forfeited seat after forming the First Berry Ministry | 20 August 1875 | Graham Berry | | |
| Grant South | Peter Lalor | | | Forfeited seat after joining the First Berry Ministry | 20 August 1875 | Peter Lalor | | |
| Melbourne North | James Munro | | | Forfeited seat after joining the First Berry Ministry | 20 August 1875 | James Munro | | |
| Ripon and Hampden | Francis Longmore | | | Forfeited seat after joining the First Berry Ministry | 20 August 1875 | Francis Longmore | | |
| Ararat | Michael Carroll | | | Forfeited seat | 19 March 1875 | David Gaunson | | |
| Gippsland North | Frederick Smyth | | | Resigned | 19 March 1875 | James McKean | | |
| Richmond | James Francis | | | Resigned | 8 December 1874 | Joseph Bosisto | | |
| Bourke East | Robert Ramsay | | | Forfeited seat after joining the Kerferd Ministry | 18 August 1874 | Robert Ramsay | | |
| Ballarat East | Townsend McDermott | | | Forfeited seat after joining the Kerferd Ministry | 12 August 1874 | Townsend McDermott | | |
| Maldon | James Service | | | Forfeited seat after joining the Kerferd Ministry | 12 August 1874 | James Service | | |
| Grenville | Mark Pope | | | Died | 31 July 1874 | Richard Lock | | |
| Collingwood | John Everard | | | Resigned | 29 July 1874 | George Langridge | | |
| St Kilda | James Stephen | | | Resigned to take up appointment on the Supreme Court of Victoria | 15 May 1874 | Edward Dixon | | |
7th Legislative Assembly (1871–1874) |
| By-election | Incumbent | Party | Reason | Date | Winner | Party |
|---|
| Ovens | George Kerferd | | | Forfeited seat after joining the Francis Ministry | 11 May 1874 | George Kerferd | | |
| East Bourke Boroughs | William Champ | | | Resigned | 26 May 1873 | George Higinbotham | | |
| Portland | Howard Spensley | | | Resigned | 20 May 1873 | Thomas Must | | |
| Grenville | Thomas Russell | | | Resigned | 24 February 1873 | John Montgomery | | |
| St Kilda | Thomas Fellows | | | Resigned to take up appointment on the Supreme Court of Victoria | 13 January 1873 | Robert Murray Smith | | |
| Murray | William Witt | | | Resigned | 8 July 1872 | John Orr | | |
| Mandurang | James Casey | | | Forfeited seat after joining the Francis Ministry | 26 June 1872 | James Casey | | |
| Maryborough | Duncan Gillies | | | Forfeited seat after joining the Francis Ministry | 26 June 1872 | Duncan Gillies | | |
| Melbourne East | Edward Cohen | | | Forfeited seat after joining the Francis Ministry | 26 June 1872 | Edward Cohen | | |
| Melbourne West | Edward Langton | | | Forfeited seat after joining the Francis Ministry | 26 June 1872 | Edward Langton | | |
| Ovens | George Kerferd | | | Forfeited seat after joining the Francis Ministry | 26 June 1872 | George Kerferd | | |
| Richmond | James Francis | | | Forfeited seat after forming the Francis Ministry | 26 June 1872 | James Francis | | |
| St Kilda | James Stephen | | | Forfeited seat after joining the Francis Ministry | 26 June 1872 | James Stephen | | |
| Sandhurst | Angus Mackay | | | Forfeited seat after joining the Francis Ministry | 26 June 1872 | Angus Mackay | | |
| Mornington | James McCulloch | | | Resigned | 26 March 1872 | James Purves | | |
| Collingwood | William Vale | | | Forfeited seat after joining the Duffy Ministry | 9 December 1871 | William Vale | | |
| Ballarat East | Robert Walsh | | | Forfeited seat after joining the Duffy Ministry | 18 July 1871 | Robert Walsh | | |
| Ararat | William McLellan | | | Forfeited seat after joining the Duffy Ministry | 30 June 1871 | William McLellan | | |
| Avoca | James Grant | | | Forfeited seat after joining the Duffy Ministry | 30 June 1871 | James Grant | | |
| Dalhousie | Charles Duffy | | | Forfeited seat after forming the Duffy Ministry | 30 June 1871 | Charles Duffy | | |
| Geelong West | Graham Berry | | | Forfeited seat after joining the Duffy Ministry | 30 June 1871 | Graham Berry | | |
| Portland | Howard Spensley | | | Forfeited seat after joining the Duffy Ministry | 30 June 1871 | Howard Spensley | | |
| Ripon and Hampden | Francis Longmore | | | Forfeited seat after joining the Duffy Ministry | 30 June 1871 | Francis Longmore | | |
| Villiers and Heytesbury | Michael O'Grady | | | Forfeited seat after joining the Duffy Ministry | 30 June 1871 | Michael O'Grady | | |
6th Legislative Assembly (1868–1871) |
| By-election | Incumbent | Party | Reason | Date | Winner | Party |
|---|
| Creswick | William Frazer | | | Died | 30 December 1870 | James Stewart | | |
| Castlemaine | William Baillie | | | Resigned | 5 December 1870 | James Patterson | | |
| Bourke East | Matthew McCaw | | | Resigned | 24 September 1870 | Robert Ramsay | | |
| St Kilda | Butler Aspinall | | | Resigned | 13 September 1870 | James Stephen | | |
| Avoca | James Grant | | | Resigned | 25 July 1870 | Peter Finn | | |
| Villiers and Heytesbury | Morgan McDonnell | | | Resigned | 25 July 1870 | Michael O'Grady | | |
| Geelong West | James Carr | | | Resigned | 6 May 1870 | Robert Johnstone | | |
| Ballarat West | John James | | | Resigned | 30 April 1870 | Archibald Michie | | |
| Ararat | William Wilson | | | Forfeited seat after joining the Third McCulloch Ministry | 26 April 1870 | William Wilson | | |
| Dundas | Alexander MacPherson | | | Forfeited seat after joining the Third McCulloch Ministry | 26 April 1870 | Alexander MacPherson | | |
| Belfast | Henry Wrixon | | | Forfeited seat after joining the Third McCulloch Ministry | 25 April 1870 | Henry Wrixon | | |
| Collingwood | William Bates | | | Forfeited seat after joining the Third McCulloch Ministry | 25 April 1870 | William Bates | | |
| Mornington | James McCulloch | | | Forfeited seat after forming the Third McCulloch Ministry | 25 April 1870 | James McCulloch | | |
| Richmond | James Francis | | | Forfeited seat after joining the Third McCulloch Ministry | 25 April 1870 | James Francis | | |
| Sandhurst | Angus Mackay | | | Forfeited seat after joining the Third McCulloch Ministry | 25 April 1870 | Angus Mackay | | |
| Maryborough | Robert Bowman | | | Resigned | 29 March 1870 | Duncan Gillies | | |
| Geelong West | Graham Berry | | | Forfeited seat after joining the MacPherson Ministry | 7 February 1870 | Graham Berry | | |
| St Kilda | Butler Aspinall | | | Forfeited seat after joining the MacPherson Ministry | 1 February 1870 | Butler Aspinall | | |
| Ararat | William McLellan | | | Forfeited seat after joining the MacPherson Ministry | 29 January 1870 | William McLellan | | |
| Crowlands | Robert Byrne | | | Forfeited seat after joining the MacPherson Ministry | 9 October 1869 | George Rolfe | | |
| Ripon and Hampden | Francis Longmore | | | Forfeited seat after joining the MacPherson Ministry | 9 October 1869 | Francis Longmore | | |
| Villiers and Heytesbury | Morgan McDonnell | | | Forfeited seat after joining the MacPherson Ministry | 9 October 1869 | Morgan McDonnell | | |
| Dundas | John MacPherson | | | Forfeited seat after forming the MacPherson Ministry | 8 October 1869 | John MacPherson | | |
| Bourke West | John Smith | | | Forfeited seat after joining the MacPherson Ministry | 7 October 1869 | John Smith | | |
| Maryborough | James McKean | | | Forfeited seat after joining the MacPherson Ministry | 7 October 1869 | James McKean | | |
| Collingwood | Isaac Reeves | | | Forfeited seat after joining the MacPherson Ministry | 5 October 1869 | William Vale | | |
| Melbourne East | Edward Cohen | | | Forfeited seat after joining the MacPherson Ministry | 5 October 1869 | Edward Cohen | | |
| Ararat | William Wilson | | | Forfeited seat after joining the Second McCulloch Ministry | 14 September 1869 | William Wilson | | |
| Ballarat West | William Vale | | | Resigned | 23 May 1869 | John James | | |
| Ballarat West | Charles Jones | | | Expelled for Corruption | 10 May 1869 | Charles Jones | | |
| Portland | James Butters | | | Expelled for Bribery | 5 May 1869 | James Butters | | |
| Ballarat West | Charles Jones | | | Expelled for Bribery | 27 March 1869 | Charles Jones | | |
| Gipps Land South | Thomas McCombie | | | Resigned | 19 March 1869 | George Macartney | | |
| Castlemaine | Samuel Bindon | | | Resigned | 30 October 1868 | Richard Kitto | | |
| Geelong West | Nicholas Foott | | | Died | 16 October 1868 | Graham Berry | | |
| Bourke East | James Balfour | | | Resigned | 29 August 1868 | William Lobb | | |
| Ovens | George Smith | | | Forfeited seat after joining the Second McCulloch Ministry | 1 August 1868 | George Smith | | |
| Ballarat West | Charles Jones | | | Forfeited seat after joining the Second McCulloch Ministry | 30 July 1868 | Charles Jones | | |
| Ballarat West | William Vale | | | Forfeited seat after joining the Second McCulloch Ministry | 30 July 1868 | William Vale | | |
| Bourke South | George Smith | | | Forfeited seat after joining the Second McCulloch Ministry | 30 July 1868 | George Smith | | |
| Mornington | James McCulloch | | | Forfeited seat after forming the Second McCulloch Ministry | 30 July 1868 | James McCulloch | | |
| Avoca | James Grant | | | Forfeited seat after joining the Second McCulloch Ministry | 25 July 1868 | James Grant | | |
| Mandurang | James Casey | | | Forfeited seat after joining the Second McCulloch Ministry | 25 July 1868 | James Casey | | |
| Mandurang | James Sullivan | | | Forfeited seat after joining the Second McCulloch Ministry | 25 July 1868 | James Sullivan | | |
| Emerald Hill | George Verdon | | | Resigned to take up appointment as Agent-General for Victoria in London | 17 June 1868 | John Whiteman | | |
| Ovens | George Kerferd | | | Forfeited seat after joining the Sladen Ministry | 27 May 1868 | George Kerferd | | |
| Villiers and Heytesbury | William Bayles | | | Forfeited seat after joining the Sladen Ministry | 27 May 1868 | William Bayles | | |
| Villiers and Heytesbury | Morgan McDonnell | | | Forfeited seat after joining the Sladen Ministry | 27 May 1868 | Morgan McDonnell | | |
| Ballarat West | Duncan Gillies | | | Forfeited seat after joining the Sladen Ministry | 25 May 1868 | Charles Jones | | |
| Bourke South | Michael O'Grady | | | Forfeited seat after joining the Sladen Ministry | 25 May 1868 | John Crews | | |
| Melbourne West | Edward Langton | | | Forfeited seat after joining the Sladen Ministry | 19 May 1868 | Edward Langton | | |
| St Kilda | Thomas Fellows | | | Forfeited seat after joining the Sladen Ministry | 19 May 1868 | Thomas Fellows | | |
5th Legislative Assembly (1866–1868) |
| By-election | Incumbent | Party | Reason | Date | Winner | Party |
|---|
| Grant South | William McCann | | | Imprisoned for Forgery | 13 September 1867 | William Stutt | | |
| Dalhousie | George Sands | | | Resigned | 12 August 1867 | Charles Duffy | | |
| Maldon | John Ramsay | | | Died | 14 June 1867 | William Williams | | |
| Mandurang | James Sullivan | | | Forfeited seat after joining the First McCulloch Ministry | 25 March 1867 | James Sullivan | | |
| Richmond | Archibald Wardrop | | | Resigned | 25 September 1866 | Ambrose Kyte | | |
| Ballarat West | William Vale | | | Forfeited seat after joining the First McCulloch Ministry | 6 August 1866 | William Vale | | |
| Castlemaine | Samuel Bindon | | | Forfeited seat after joining the First McCulloch Ministry | 1 August 1866 | Samuel Bindon | | |
| Rodney | John MacGregor | | | Forfeited seat after joining the First McCulloch Ministry | 1 August 1866 | John MacGregor | | |
4th Legislative Assembly (1864–1866) |
| By-election | Incumbent | Party | Reason | Date | Winner | Party |
|---|
| Ballarat West | William Vale | | | Forfeited seat after joining the First McCulloch Ministry | 11 September 1865 | William Vale | | |
3rd Legislative Assembly (1861–1864) |
| By-election | Incumbent | Party | Reason | Date | Winner | Party |
|---|
| East Bourke Boroughs | Richard Heales | | | Died | 9 July 1864 | Edward Cope | | |
| Villiers and Heytesbury | Richard Ireland | | | Resigned | 19 May 1864 | Samuel MacGregor | | |
| Gipps Land North | George Mackay | | | Resigned | 11 April 1864 | John Everard | | |
| Ballarat West | William Smith | | | Resigned | 4 February 1864 | Robert Lewis | | |
| Mandurang | John Owens | | | Resigned | 12 August 1863 | James Casey | | |
| Polwarth and South Grenville | William Nixon | | | Resigned | 27 July 1863 | Archibald Michie | | |
| Avoca | James Grant | | | Forfeited seat after joining the First McCulloch Ministry | 18 July 1863 | James Grant | | |
| Mandurang | James Sullivan | | | Forfeited seat after joining the First McCulloch Ministry | 15 July 1863 | James Sullivan | | |
| Mornington | James McCulloch | | | Forfeited seat after forming the First McCulloch Ministry | 15 July 1863 | James McCulloch | | |
| East Bourke Boroughs | Richard Heales | | | Forfeited seat after joining the First McCulloch Ministry | 11 July 1863 | Richard Heales | | |
| Richmond | James Francis | | | Forfeited seat after joining the First McCulloch Ministry | 10 July 1863 | James Francis | | |
| Brighton | George Higinbotham | | | Forfeited seat after joining the First McCulloch Ministry | 9 July 1863 | George Higinbotham | | |
| Williamstown | George Verdon | | | Forfeited seat after joining the First McCulloch Ministry | 9 July 1863 | George Verdon | | |
| Bourke South | Louis Smith | | | Resigned | 3 June 1863 | Louis Smith | | |
| Evelyn | William Jones | | | Resigned | 5 May 1863 | John Thompson | | |
| Rodney | Wilson Gray | | | Resigned | 3 November 1862 | John MacGregor | | |
| Gipps Land South | George Hedley | | | Resigned | 24 October 1862 | John Johnson | | |
| Sandhurst | William Denova | | | Resigned | 30 August 1862 | Robert Strickland | | |
| Ripon and Hampden | James Service | | | Resigned | 29 August 1862 | George Morton | | |
| Castlemaine | Vincent Pyke | | | Resigned | 10 July 1862 | George Smyth | | |
| Ararat | Daniel Flint | | | Resigned | 10 April 1862 | Tharp Girdlestone | | |
| Brighton | William Brodribb | | | Resigned | 7 April 1862 | George Higinbotham | | |
| Grenville | Robert Gillespie | | | Resigned | 17 March 1862 | Mark Pope | | |
| Mornington | Henry Chapman | | | Resigned | 24 February 1862 | James McCulloch | | |
| Maryborough | George Evans | | | Forfeited seat after joining the Third O'Shanassy Ministry | 13 January 1862 | George Evans | | |
| Portland | William Haines | | | Forfeited seat after joining the Third O'Shanassy Ministry | 10 December 1861 | William Haines | | |
| Villiers and Heytesbury | Charles Duffy | | | Forfeited seat after joining the Third O'Shanassy Ministry | 3 December 1861 | Charles Duffy | | |
| Villiers and Heytesbury | Richard Ireland | | | Forfeited seat after joining the Third O'Shanassy Ministry | 3 December 1861 | Richard Ireland | | |
| Warrnambool | Thomas Manifold | | | Resigned | 3 December 1861 | John Wood | | |
| St Kilda | James Johnston | | | Forfeited seat after joining the Third O'Shanassy Ministry | 28 November 1861 | James Johnston | | |
| Emerald Hill | Robert Anderson | | | Forfeited seat after joining the Third O'Shanassy Ministry | 27 November 1861 | Robert Anderson | | |
| Kilmore | John O'Shanassy | | | Forfeited seat after forming the Third O'Shanassy Ministry | 27 November 1861 | John O'Shanassy | | |
| Melbourne North | Patrick Costello | | | Expelled for Electoral Fraud | 18 November 1861 | John Sinclair | | |
| Castlemaine | James Chapman | | | Disqualified | November 1861 | Alexander Smith | | |
| Gipps Land North | John Everard | | | Declared Insolvent | 24 October 1861 | George Mackay | | |
| Maryborough | Richard Ireland | | | Resigned | 21 October 1861 | George Evans | | |
2nd Legislative Assembly (1859–1861) |
| By-election | Incumbent | Party | Reason | Date | Winner | Party |
|---|
| Melbourne East | Alexander Hunter | | | Resigned | 2 July 1861 | Graham Berry | | |
| Mandurang | James Sullivan | | | Forfeited seat after joining the Heales Ministry | 26 June 1861 | James Sullivan | | |
| Mandurang | George Brodie | | | Resigned | 10 June 1861 | James Sullivan | | |
| Crowlands | John Houston | | | Forfeited seat after joining the Heales Ministry | 10 June 1861 | John Houston | | |
| Brighton | Charles Ebden | | | Resigned | 20 May 1861 | George Higinbotham | | |
| Castlemaine | John Macadam | | | Forfeited seat after joining the Heales Ministry | 13 May 1861 | Alexander Smith | | |
| Wimmera | Robert Firebrace | | | Resigned | 18 May 1861 | Samuel Wilson | | |
| Villiers and Heytesbury | Alexander Russell | | | Resigned | 1 April 1861 | William Rutledge | | |
| Melbourne West | Thomas Loader | | | Forfeited seat after joining the Heales Ministry | 27 March 1861 | Thomas Loader | | |
| Avoca | James Grant | | | Forfeited seat after joining the Heales Ministry | 11 March 1861 | James Grant | | |
| Mandurang | George Brodie | | | Forfeited seat after joining the Heales Ministry | 8 March 1861 | George Brodie | | |
| Warrnambool | George Horne | | | Resigned | 4 March 1861 | Thomas Manifold | | |
| Ballarat West | John Bailey | | | Resigned | 23 February 1861 | Duncan Gillies | | |
| Bourke South | Hibbert Newton | | | Forfeited seat after joining the Heales Ministry | 13 December 1860 | Hibbert Newton | | |
| Ballarat West | John Bailey | | | Forfeited seat after joining the Heales Ministry | 12 December 1860 | John Bailey | | |
| Ballarat East | John Humffray | | | Forfeited seat after joining the Heales Ministry | 11 December 1860 | John Humffray | | |
| Maryborough | Richard Ireland | | | Forfeited seat after joining the Heales Ministry | 11 December 1860 | Nathaniel Levi | | |
| East Bourke Boroughs | Richard Heales | | | Forfeited seat after forming the Heales Ministry | 10 December 1860 | Richard Heales | | |
| Geelong West | John Brooke | | | Forfeited seat after joining the Heales Ministry | 10 December 1860 | John Brooke | | |
| Melbourne West | Thomas Loader | | | Forfeited seat after joining the Heales Ministry | 10 December 1860 | Thomas Loader | | |
| St Kilda | James Johnston | | | Forfeited seat after joining the Heales Ministry | 10 December 1860 | James Johnston | | |
| Emerald Hill | Robert Anderson | | | Forfeited seat after joining the Heales Ministry | 8 December 1860 | Robert Anderson | | |
| Williamstown | George Verdon | | | Forfeited seat after joining the Heales Ministry | 8 December 1860 | George Verdon | | |
| Gipps Land South | Angus McMillan | | | Resigned | 23 November 1860 | George Hedley | | |
| Castlemaine | Vincent Pyke | | | Resigned | 17 October 1860 | Vincent Pyke | | |
| Castlemaine | Butler Aspinall | | | Resigned | 9 October 1860 | James Chapman | | |
| Geelong West | James Harrison | | | Resigned | 9 October 1860 | Nicholas Foott | | |
| Geelong East | Augustus Greeves | | | Forfeited seat after joining the Nicholson Ministry | 6 October 1860 | Augustus Greeves | | |
| Portland | Norman McLeod | | | Resigned | September 1860 | William Haines | | |
| Evelyn | William Bell | | | Resigned | 27 March 1860 | William Jones | | |
| Ovens | Alexander Keefer | | | Resigned | 26 March 1860 | John Donald | | |
| Maldon | George Harker | | | Resigned | 13 March 1860 | James Martley | | |
| Bourke West | Patrick Phelan | | | Election declared void | 13 February 1860 | John Riddell | | |
| Geelong East | James Cowie | | | Resigned | 7 February 1860 | Augustus Greeves | | |
| Rodney | John Everard | | | Resigned | 11 January 1860 | Wilson Gray | | |
| Evelyn | John King | | | Resigned | 31 December 1859 | William Bell | | |
| Richmond | James Francis | | | Forfeited seat after joining the Nicholson Ministry | 9 December 1859 | James Francis | | |
| Ovens | John Wood | | | Forfeited seat after joining the Nicholson Ministry | 14 November 1859 | John Wood | | |
| Ripon and Hampden | James Service | | | Forfeited seat after joining the Nicholson Ministry | 14 November 1859 | James Service | | |
| Evelyn | John King | | | Forfeited seat after joining the Nicholson Ministry | 11 November 1859 | John King | | |
| Ballarat West | John Bailey | | | Forfeited seat after joining the Nicholson Ministry | 9 November 1859 | John Bailey | | |
| Castlemaine | Vincent Pyke | | | Forfeited seat after joining the Nicholson Ministry | 9 November 1859 | Vincent Pyke | | |
| Melbourne East | James McCulloch | | | Forfeited seat after joining the Nicholson Ministry | 8 November 1859 | James McCulloch | | |
| Sandridge | William Nicholson | | | Forfeited seat after forming the Nicholson Ministry | 8 November 1859 | William Nicholson | | |
1st Legislative Assembly (1856–1859) |
| By-election | Incumbent | Party | Reason | Date | Winner | Party |
|---|
| The Murray | William Forlonge | | | Resigned | 1 January 1859 | William Nicholson | | |
| South Grant | William Haines | | | Resigned | 1 January 1859 | John Bell | | |
| South Melbourne | Andrew Clarke | | | Resigned | 1 October 1858 | Robert Anderson | | |
| St Kilda | Thomas Fellows | | | Resigned | 1 May 1858 | John Crews | | |
| Dundas and Follett | Charles Griffith | | | Resigned | 1 April 1858 | William Mollison | | |
| Geelong | Charles Read | | | Resigned | 1 April 1858 | James Harrison | | |
| Geelong | Alexander Fyfe | | | Resigned | 1 February 1858 | George Board | | |
| St Kilda | Frederick Sargood | | | Resigned | 5 January 1858 | Henry Chapman | | |
| The Murray | John Goodman | | | Resigned | 1 January 1858 | William Forlonge | | |
| Rodney | John Baragwanath | | | Resigned | 1 January 1858 | John Everard | | |
| Geelong | Charles Sladen | | | Resigned | 1 December 1857 | Alexander Thomson | | |
| Gippsland | John King | | | Resigned | 1 November 1857 | John Johnson | | |
| Castlemaine Boroughs | Alexander Palmer | | | Resigned | 1 August 1857 | Richard Davies Ireland | | |
| West Bourke | Robert McDougall | | | Resigned | 1 August 1857 | Joseph Wilkie | | |
| Colac | Andrew Rutherford | | | Resigned | 1 July 1857 | Theodore Hancock | | |
| Portland | Hugh Childers | | | Resigned | 1 July 1857 | John Findlay | | |
| South Bourke | Charles Pasley | | | Resigned | 1 July 1857 | Sidney Ricardo | | |
| Ovens | Daniel Cameron | | | Resigned | 1 April 1857 | John Wood | | |
| Brighton | Jonathan Binns Were | | | Resigned | 1 March 1857 | Charles Ebden | | |
| Castlemaine Boroughs | Vincent Pyke | | | Resigned | 1 March 1857 | Robert Sitwell | | |
| East Bourke | Augustus Greeves | | | Resigned | 1 March 1857 | Richard Heales | | |
| Melbourne | William Stawell | | | Resigned | 1 March 1857 | James Service | | |
| Melbourne | John O'Shanassy | | | Resigned; having been elected to a seat for both the Melbourne and Kilmore districts, he decided to represented the latter. | 1 January 1857 | Henry Langlands | | |