| Senate | Election | Senator (Party) | Senator (Party) | Senator (Party) | Senator (Party) | Senator (Party) | Senator (Party) | Senator (Party) | Senator (Party) | Senator (Party) | Senator (Party) | Senator (Party) | Senator (Party) |
|---|
| 1901–1903 | 1901 | | David Charleston (Free Trade) [1] | | Gregor McGregor (Labor) [2] | | Thomas Playford (Protectionist) [3] | | Sir Richard Baker (Free Trade) [4] | | Sir Josiah Symon (Free Trade/ Liberal) [5] | | Sir John Downer (Protectionist) [6] | 6 senators per state 1901-1950 |
|---|
| 1904–1906 | 1903 | | Robert Guthrie (Labor/ National Labor/ Nationalist) [7] | | William Story (Labor/ National Labor/ Nationalist) [8] |
| 1907–1910 | 1906 | | Joseph Vardon (Anti-Socialist) [9] | | William Russell (Labor) [10] |
| 1907 | | James O'Loghlin (Labor) [11] |
| 1908 | | Joseph Vardon (Anti-Socialist/ Liberal) [9] |
| 1909 | | |
| 1910–1913 | 1910 |
| 1912 | | John Shannon (Liberal) [12] |
| 1913–1914 | 1913 | John Newlands (Liberal/ Nationalist/ UAP) [13] | | William Senior (Labor/ National Labor/ Nationalist) [14] | | James O'Loghlin (Labor) [11] |
| 1914–1917 | 1914 | | John Shannon (Liberal/ Nationalist) [12] |
| 1916 | | | |
| Feb 1917 | | | | | |
| May 1917 | James Rowell (Nationalist/ Liberal Union) [15] |
| 1917–1920 | 1917 |
| 1920–1923 | 1919 | Benjamin Benny (Nationalist) [16] | | Victor Wilson (Nationalist) [17] |
| 1921 | | Edward Vardon (Nationalist) [18] |
| 1922 | | Bert Hoare (Labor) [19] | |
| 1923–1926 | 1922 | | Charles McHugh (Labor) [20] | | James O'Loghlin (Labor) [11] |
| 1925 | | Henry Barwell (Nationalist) [21] |
| 1926 | Alexander McLachlan (Nationalist/ UAP) [22] |
| 1926–1929 | 1925 | | John Chapman (Country) [23] |
| 1927 | | John Verran (Nationalist) [24] |
| April 1928 | Albert Robinson (Nationalist) [25] |
| Nov 1928 | | John Daly (Labor) [26] | | Mick O'Halloran (Labor) [27] |
| 1929–1932 | 1928 |
| April 1931 | | Harry Kneebone (Labor) [28] |
| May 1931 | | |
| Dec 1931 | | Jack Duncan-Hughes (UAP) [29] |
| 1932–1935 | 1931 | | Oliver Badman (Country) [30] |
| 1935–1938 | 1934 | | George McLeay (UAP/ Liberal) [31] | | Oliver Uppill (UAP) [32] | | James McLachlan (UAP/ Liberal) [33] |
| 1937 | | Philip McBride (UAP) [34] |
| 1938–1941 | 1937 | Keith Wilson (UAP) [35] |
| 1941–1944 | 1940 |
| 1944–1947 | 1943 | | Theo Nicholls (Labor) [36] | | Alex Finlay (Labor) [37] | | Sid O'Flaherty (Labor) [38] |
| 1944 | Ted Mattner (UAP/ Liberal) [39] |
| 1945 | | | |
| 1946 | | Fred Beerworth (Labor) [40] |
| 1947–1950 | 1946 | | Frederick Ward (Labor) [41] | | Jack Critchley (Labor) [42] |
| 1950 | | Clive Hannaford (Liberal) [43] | | George McLeay (Liberal) [31] | | John Ryan (Labor) [44] | | Ted Mattner (Liberal) [39] | 10 senators per state 1950-1984 |
|---|
| 1950–1951 | 1949 |
| 1951–1953 | 1951 | | Keith Laught (Liberal) [45] | | Rex Pearson (Liberal) [46] |
| 1953–1956 | 1953 | Jim Toohey (Labor) [47] |
| 1955 | Nancy Buttfield (Liberal) [48] |
| 1956–1959 | 1955 |
| 1959–1962 | 1958 | Arnold Drury (Labor) [49] | Clem Ridley (Labor) [50] |
| Sep 1961 | Gordon Davidson (Liberal) [51] |
| Dec 1961 | Nancy Buttfield (Liberal) [48] | Vacant |
|---|
| 1962 | | Gordon Davidson (Liberal) [51] |
| 1962–1965 | 1961 | Jim Cavanagh (Labor) [52] | | Reg Bishop (Labor) [53] |
| 1965–1968 | 1964 | Gordon Davidson (Liberal) [51] |
| 1967 | Sir Condor Laucke (Liberal) [54] |
| 1968–1971 | 1967 | | Harold Young (Liberal) [55] | Nancy Buttfield (Liberal) [48] |
| May 1969 | Martin Cameron (Liberal) [56] |
| Oct 1969 | | Don Cameron (Labor) [57] |
| 1971–1974 | 1970 | Geoff McLaren (Labor) [58] | | Don Jessop (Liberal) [59] |
| 1974–1975 | 1974 | | Steele Hall (Liberal Movement/ Liberal) [60] |
| 1975–1978 | 1975 | | Tony Messner (Liberal) [61] |
| 1976 | |
| 1977 | | Janine Haines (Democrat) [62] |
| 1978–1981 | 1977 | Ron Elstob (Labor) [63] | | Baden Teague (Liberal) [64] |
| 1981–1983 | 1980 | Robert Hill (Liberal) [65] | Dominic Foreman (Labor) [66] | | Janine Haines (Democrat) [62] | Nick Bolkus (Labor) [67] |
| 1983–1985 | 1983 | | Rosemary Crowley (Labor) [68] | Graham Maguire (Labor) [69] |
| 1984 | | Amanda Vanstone (Liberal) [70] | | David Vigor (Democrat/ Unite Australia) [71] |
| 1985–1987 | 1984 |
| 1987 | |
| 1987–1990 | 1987 | Chris Schacht (Labor) [72] | Grant Chapman (Liberal) [73] | | John Coulter (Democrat) [74] |
| 1990 | John Olsen (Liberal) [75] | Meg Lees (Democrat/ Independent/ Progressive Alliance) [76] |
| 1990–1993 | 1990 |
| 1992 | Alan Ferguson (Liberal) [77] |
| 1993–1996 | 1993 | | Nick Minchin (Liberal) [78] |
| 1995 | Natasha Stott Despoja (Democrat) [79] |
| 1996–1999 | 1996 | Jeannie Ferris (Liberal) [80] |
| 12 July 1996 | Vacant |
|---|
| 24 July 1996 | | Jeannie Ferris (Liberal) [80] |
| 1997 | John Quirke (Labor) [81] |
| 1999–2002 | 1998 |
| 2000 | Geoff Buckland (Labor) [82] |
| 2002–2005 | 2001 | Penny Wong (Labor) [83] | Linda Kirk (Labor) [84] |
| 2002 | |
| 2003 | |
| 2005–2008 | 2004 | Anne McEwen (Labor) [85] | | Annette Hurley (Labor) [86] | Dana Wortley (Labor) [87] |
| 2006 | Cory Bernardi (Liberal/ Conservative/ Independent) [88] |
| 2007 | Simon Birmingham (Liberal) [89] | Mary Jo Fisher (Liberal) [90] |
| 2008–2011 | 2007 | Don Farrell (Labor) [91] | | Nick Xenophon (Independent /Xenophon) [92] | | Sarah Hanson-Young (Greens) [93] |
| 2011–2014 | 2010 | Sean Edwards (Liberal) [94] | David Fawcett (Liberal) [95] | Alex Gallacher (Labor) [96] | | Penny Wright (Greens) [97] |
| 2012 | Anne Ruston (Liberal) [98] |
| 2013 | |
| 2014–2016 | 2013 | | Bob Day (Family First) [99] |
| 2015 | Robert Simms (Greens) [100] |
| 2016–2019 | 2016 | | Skye Kakoschke-Moore (Xenophon) [101] | Don Farrell (Labor) [91] | | Stirling Griff (Xenophon) [102] |
| 2017 | | Lucy Gichuhi (Independent /Liberal) [103] | | Rex Patrick (Xenophon/ Independent/ Rex Patrick Team) [104] |
| 2018 | | | Tim Storer (Independent) [105] |
| 2019–2022 | 2019 | Alex Antic (Liberal) [106] | | Marielle Smith (Labor) [107] |
| 2019 | |
| 2020 | | Andrew McLachlan (Liberal) [108] | |
| 2021 | Karen Grogan (Labor) [109] | |
| 2022–2025 | 2022 | | Barbara Pocock (Greens) [110] | | Kerrynne Liddle (Liberal) [111] |
| 2025 | Leah Blyth (Liberal) [112] |
| 2025–2028 | 2025 | | Charlotte Walker (Labor) [113] |