Provincial politics
1942 by-election
A CCFer was elected to the Legislative Assembly of Alberta for the first time in a 1942 by-election. (Camrose college instructor and CCF leader Chester Ronning had been elected in October 25, 1932 provincial by-election as joint UFA/CCF candidate but was defeated in 1935 and was unable to regain his seat in the 1940 election. He resigned as CCF leader in 1942 and went on to be Canada's ambassador to China, where he had been born. Angus James Morrison was elected as a Labour MLA in 1940 by defeating the incumbent Social Credit MLA as well as a CCF candidate. The CCF and the Alberta Labour clubs merged in 1942 but Morrison did not run for re-election in 1944.)
- Elmer Roper - printer, labour activist, Mayor of Edmonton 1959–1963 - Edmonton #1 1942by-1944-1948-1952-1955 (ran, CCF lost)
1944 general election
A second CCF was elected in a by-election. By joining Elmer Roper, he increased the party's caucus in the Legislature to two members.
1948 general election
Both incumbent CCFers were re-elected in the 1948 election, but the party won no additional seats.
1952 general election
A new CCF MLA was elected in the 1952 election, and Roper was re-elected.
- Nick Dushenski - Willingdon - 1952-1955-1959 (1959 did not run, a different CCF candidate was unsuccessful)
1955 general election
A new CCF MLA was elected in the 1955 election, while Roper lost his seat.
1959 and 1963 general elections
No CCFers or New Democrats were elected in the 1959 or 1963 general elections including leader Neil Reimer.
1966 by-election
One New Democrat was elected in a 1966 by-election.
- Garth Turcott - Pincher Creek-Crowsnest 1966by-1967 (ran, NDP lost)
1967 general election
No New Democrats were elected in the 1967 election.
1971 general election
One New Democrat was elected in the 1971 election.
- Grant Notley - teacher - Spirit River-Fairview (Dunvegan-Central Peace) 1971-1975-1979-1982-1984 (died in plane crash)
1975-1979 general elections
The single New Democrat was re-elected alone in these elections.
1982 general election
One additional New Democrat was elected in the 1982 election, increasing the party's caucus to two members.
- Ray Martin - Edmonton Norwood - 1982-1986-1993, Edmonton-Beverly-Cleaview 2004-2008
1985 by-election
The NDP retained one seat in a 1985 by-election, caused by the death of Grant Notley.
- Jim Gurnett - Spirit River-Fairview - 1985by-1986 (1986 ran but was not re-elected)
1986 general election
Fifteen additional New Democrats were elected in the 1986 election, increasing the party's caucus to 16 members.
- Leo Piquette - Athabasca-Lac La Biche - 1986–1989 (1989 ran but was not re-elected)
- Barry Pashak - Calgary Forest Lawn - 1986-1989-1993 (1993 ran, but not re-elected)
- Bob Hawkesworth - Calgary Mountain View - 1986-1989-1993 (1993 ran, but not re-elected)
- Marie Laing - Edmonton Avonmore - 1986-1989-1993 (1993 ran, but not re-elected)
- Tom Sigurdson - Edmonton Belmont - 1986-1989-1993 (1993 ran, but not re-elected)
- Ed Ewasiuk - Edmonton Beverly - 1986-1989-1993 (1993 ran, but not re-elected) (formerly Edmonton Alderman 1980–1986)
- Christie Mjolsness - Edmonton Calder - 1986-1989-1993 (1993 ran, but not re-elected)
- William Roberts - Edmonton Centre - 1986-1989-1993 (1993 ran, but not re-elected)
- John Younie - Edmonton Glengarry - 1986–1989 (ran, but not re-elected)
- Pam Barrett - Edmonton Highlands - 1986-1989-1993, 1997-2000by (2000 retired, a different NDP candidate won)
- Alex McEachern - Edmonton Kingsway - 1986-1989-1993 (1993 ran, but not re-elected)
- Gerry Gibeault - Edmonton Mill Woods - 1986-1989-1993 (1993 ran, but not re-elected)
- Gordon Wright - Edmonton Strathcona - 1986-1989-1990by (died in office, NDP-er Barrie Chivers won the subsequent by-election)
- Bryan Strong - St. Albert - 1986–1989 (1989 did not run)
- Derek Fox - Vegreville - 1986-1989-1993 (1993 ran, but not re-elected)
1989 general election
The party lost three MLAs (Piquette, Younie, Strong) but gained three other seats in the 1989 election.
- John McInnis - Edmonton Jasper Place - 1989–1993 (1993 ran, but not re-elected)
- Stan Woloshyn - Stony Plain - 1989–1993 (he joined the P-C caucus)
- Jerry Doyle - West Yellowhead - 1989–1993 (1993 ran, but not re-elected)
1990 by-election
An additional New Democrat was elected in a 1990 by-election, occasioned by the death of sitting MLA Gordon Wright.
- Barrie Chivers - Edmonton Strathcona 1990–1993 (1993 ran, but not re-elected)
1993 general election
All incumbent New Democrats were defeated and no new NDP MLAs were elected in the 1993 election.
1997 general election
Two New Democrats were elected in the 83 seats available in the 1997 election, one of whom (Pam Barrett) had previously served in the Legislature.
- Raj Pannu - Edmonton Strathcona 1997–2008 (retired, but a different NDP candidate, Rachel Notley (daughter of former NDP MLA Grant Notley), won)
2000 by-election
The NDP retained one seat in a 2000 by-election, occasioned by the resignation of Pam Barrett.
- Brian Mason - Edmonton Highlands 2000–2004, Edmonton Highlands-Norwood 2004–2019 (formerly Edmonton Councillor Oct. 1989–2000)
2001 general election
The party won two of the 83 seats available in the 2001 election - Pannu and Mason being re-elected.
2004 general election
The party won two additional seats in the 2004 election, for a total of four (including sitting MLAs Raj Pannu and Brian Mason). One of the new members, Ray Martin (Edmonton Beverly Clareview), had previously served in the Legislature.
- David Eggen - Edmonton-Calder 2004–2008 (2008 ran, not re-elected); 2012–2019, Edmonton-North West 2019–present
2008 general election
The NDP lost 2 of its MLAs (Ray Martin and Dave Eggen) but re-elected Mason and Rachel Notley was elected to hold the Edmonton Strathcona constituency for the party, replacing Raj Pannu.
2012 general election
Four NDP MLAs were elected in the 2012 Alberta election, a gain of 2. Dave Eggen, Brian Mason and Rachel Notley were re-elected and a new NDP MLA was elected:
2015 general election
In a surprise result, the NDP won 50 additional seats and formed a majority government with leader Rachel Notley elected premier-designate. Former leader Brian Mason, as well as David Eggen and Deron Bilous were re-elected.
- Shaye Anderson - Leduc-Beaumont, 2015-2019
- Erin Babcock - Stony Plain, 2015-2019
- Oneil Carlier - Whitecourt-Ste. Anne, 2015-2019
- Jon Carson - Edmonton-Meadowlark 2015–2019, Edmonton-West Henday 2019–present (previously held riding of Edmonton-Meadowlark eliminated in re-distribution)
- Joe Ceci - Calgary-Fort, 2015-2019 Calgary-Buffalo, 2019–present (previously held riding of Calgary-Fort eliminated in re-distribution)
- Michael Connolly - Calgary-Hawkwood, 2015-2019
- Craig Coolahan - Calgary-Klein, 2015-2019
- Estefania Cortes-Vargas - Strathcona-Sherwood Park, 2015-2019
- Lorne Dach - Edmonton-McClung, 2015–present
- Thomas Dang - Edmonton-South West 2015–present, Edmonton-South 2019–present (previously held riding of Edmonton-South West eliminated in re-distribution)
- Deborah Drever - Calgary-Bow, 2015–2019 (Expelled from the NDP caucus in 2015 for inappropriate social media posts, but was re-admitted in 2016)
- Richard Feehan - Edmonton-Rutherford, 2015–present
- Maria Fitzpatrick - Lethbridge-East, 2015-2019
- Kathleen Ganley - Calgary-Buffalo 2015–2019, Calgary-Mountain View 2019–present (switched from previous held riding to allow Joe Ceci to contest Calgary-Buffalo)
- Nicole Goehring - Edmonton-Castle Downs, 2015–present
- Christina Gray - Edmonton-Mill Woods, 2015–present
- Bruce Hinkley - Wetaskiwin-Camrose, 2015-2019
- Sarah Hoffman - Edmonton-Glenora, 2015–present
- Trevor Horne - Spruce Grove-St. Albert, 2015–2019
- Debbie Jabbour - Peace River, 2015-2019
- Anam Kazim - Calgary-Glenmore, 2015-2019
- Jamie Kleinsteuber - Calgary-Northern Hills, 2015–2019
- Danielle Larivee - Lesser Slave Lake, 2015-2019
- Jessica Littlewood - Fort Saskatchewan-Vegreville, 2015-2019
- Rod Loyola - Edmonton-Ellerslie, 2015–present
- Robyn Luff - Calgary-East, 2015–2018 (sat as an independent until the 2019 election)
- Brian Malkinson - Calgary-Currie, 2015-2019
- Marg McCuaig-Boyd - Dunvegan-Central Peace-Notley, 2015–2019
- Annie McKitrick - Sherwood Park, 2015-2019
- Stephanie McLean - Calgary-Varsity, 2015-2019
- Karen McPherson - Calgary-MacKay-Nose Hill, 2015–2017 (left the NDP caucus and later joined the Alberta Party)
- Barb Miller - Red Deer-South, 2015-2019
- Ricardo Miranda - Calgary-Cross, 2015-2019
- Chris Nielsen - Edmonton-Decore, 2015–present
- Brandy Payne - Calgary-Acadia, 2015-2019
- Shannon Phillips - Lethbridge-West, 2015–present
- Colin Piquette - Athabasca-Sturgeon-Redwater, 2015-2019
- Marie Renaud - St. Albert, 2015–present
- Eric Rosendahl - West Yellowhead, 2015-2019
- Irfan Sabir - Calgary-McCall, 2015–present
- Marlin Schmidt - Edmonton-Gold Bar, 2015–present
- Kim Schreiner - Red Deer North, 2015-2019
- David Shepherd - Edmonton-Centre 2015–2019, Edmonton-City Centre 2019–present (previously held riding of Edmonton-Centre eliminated in re-distribution)
- Lori Sigurdson - Edmonton-Riverview, 2015–present
- Graham Sucha - Calgary-Shaw, 2015-2019
- Heather Sweet - Edmonton-Manning, 2015–present
- Bob Turner - Edmonton-Whitemud, 2015-2019
- Bob Wanner - Medicine Hat, 2015-2019
- Cam Westhead - Banff-Cochrane, 2015–2019
- Denise Woollard - Edmonton-Mill Creek, 2015-2019
2019 general election
The NDP majority government led by Premier Rachel Notley was defeated after a single term. The party lost 30 seats but elected three new members in previously held seats.
2023 general election
The NDP was returned as the largest official opposition in Alberta history, with an increased vote share and an additional 14 seats and 5 new members in previously held seats. The new members included:
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