This page lists results of Canadian federal elections in Southwestern Ontario.
Beginning at the start of the 1960s, Southwestern Ontario has traditionally given more support to the Liberals, aside from 1984, although there has always been a pronounced urban-rural split: the New Democrats (NDP) and Liberals are both stronger in Windsor and London, while the rural areas and Sarnia have leaned more towards the Conservatives due to their social conservative bent. The Liberals swept all the ridings in the region in 1993, 1997 and 2000, save one NDP win in 2000.
However, in the 2004, 2006, 2008 and 2011 elections, the entire region, incrementally swung away from the Liberals to support the Conservatives, including in London, where three-way vote-splitting resulted in two ridings switching from Liberal to Conservative. The loss of the second one, London North Centre, in the 2011 election, left the Liberals without any seats in Southwestern Ontario for the first time since Confederation. The exception to Conservative swing was in one London riding, London-Fanshawe, and in Windsor's two ridings, which remained with the NDP from 2006 right through the 2015 election.
In 2015, Southwestern Ontario's election results did not at all mirror the overall federal election results. The Liberals managed to take back two seats in the entire Region, both in London, but the NDP added a seat adjacent to Windsor, Essex, and the Conservatives retained four seats, three rural and also Sarnia-Lambton. The 2019 election saw the NDP lose two of the three Windsor area seats it held before the election, with one of each going to the Conservatives and the Liberals. This election also saw increased regional polarization, with all seats in urban London and Windsor being won by the Liberals or the NDP, and all other seats being won by the Conservatives.
| Election | / | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1979 | 174,830 40.0% | 101,849 23.3% | 159,609 36.5% | 933 0.2% | |||||||||||
| 1980 | 203,740 46.7% | 98,687 22.6% | 132,159 30.3% | 953 0.2% | |||||||||||
| 1984 | 136,208 29.9% | 104,223 22.9% | 214,843 47.1% | 141 0.0% | |||||||||||
| 1988 | 198,455 40.2% | 121,679 24.6% | 164,980 33.4% | 7,994 1.6% | |||||||||||
| 1993 | 266,349 54.6% | 42,763 8.8% | 1,918 0.4% | 81,334 16.7% | 83,538 17.1% | 12,129 2.5% | |||||||||
| 1997 | 209,513 47.6% | 68,895 15.6% | 3,434 0.8% | 65,717 14.9% | 84,454 19.2% | 8,343 1.9% | |||||||||
| 2000 | 201,859 48.3% | 50,285 12.0% | 3,686 0.9% | 47,883 11.5% | 110,620 26.5% | 3,190 0.8% | |||||||||
| 2004 | 182,852 38.4% | 149,902 31.5% | 116,361 24.4% | 20,020 4.2% | 5,974 1.3% | ||||||||||
| 2006 | 170,565 32.1% | 189,968 35.8% | 143,392 27.0% | 21,076 4.0% | 4,217 0.8% | ||||||||||
| 2008 | 125,074 26.6% | 183,406 39.0% | 124,325 26.5% | 33,665 7.2% | 2,811 0.6% | ||||||||||
| 2011 | 85,083 17.4% | 222,451 45.4% | 164,202 33.5% | 14,774 3.0% | 2,656 0.5% | ||||||||||
| 2015 | 188,904 33.1% | 205,474 36.0% | 158,586 27.8% | 15,734 2.8% | 2,245 0.4% | ||||||||||
| 2019 | 181,782 30.3% | 216,455 36.1% | 156,845 26.1% | 28,903 4.8% | 12,731 2.1% | 2,481 0.4% | |||||||||
| 2021 | 154,118 26.1% | 213,039 36.1% | 157,279 26.7% | 6,981 1.2% | 56,188 9.5% | 2,207 0.4% |
See main article: 2021 Canadian federal election. |-| style="background-color:whitesmoke" |Chatham-Kent—Leamington||Greg Hetherington
15,683
28.59%|||Dave Epp
22,435
40.90%||Dan Gelinas
8,007
14.60%||Mark Vercouteren
837
1.53%||Liz Vallee
7,892
14.39%|||||Dave Epp|-| style="background-color:whitesmoke" |Elgin—Middlesex—London||Afeez Ajibowu
12,326
19.55%|||Karen Vecchio
31,472
49.91%||Katelyn Cody
10,086
15.99%||Amanda Stark
1,417
2.25%||Chelsea Hillier
7,429
11.78%||Michael Hopkins (CHP)
328
0.52%|||Karen Vecchio|-|rowspan=2 style="background-color:whitesmoke" |Essex|rowspan=2 ||rowspan=2 |Audrey Festeryga
10,813
15.45%|rowspan=2 ||rowspan=2 |Chris Lewis
28,741
41.07%|rowspan=2 ||rowspan=2 |Tracey Ramsey
22,278
31.84%|rowspan=2 ||rowspan=2 |Nancy Pancheshan
865
1.24%|rowspan=2 ||rowspan=2 |Beth Charron-Rowberry
6,925
9.90%||Andrew George (Ind.)
172 0.25%|rowspan=2 ||rowspan=2 |Chris Lewis|-||Jeremy Palko (CHP)
182 0.26%|-| style="background-color:whitesmoke" |Lambton—Kent—Middlesex||Sudit Ranade
12,552
20.68%|||Lianne Rood
29,431
48.49%||Jason Henry
11,107
18.30%||Jeremy Hull
1,035
1.71%||Kevin Mitchell
6,567
10.82%|||||Lianne Rood|-| style="background-color:whitesmoke" |London—Fanshawe||Mohamed Hammoud
11,882
23.11%||Mattias Vanderley
12,486
24.28%|||Lindsay Mathyssen
22,336
43.44%||||Kyle Free
4,718
9.18%|||||Lindsay Mathyssen|-| style="background-color:whitesmoke" |London North Centre|||Peter Fragiskatos
22,921
39.10%||Stephen Gallant
15,889
27.11%||Dirka Prout
15,611
26.63%||Mary Ann Hodge
1,297
2.21%||Marc Emery
2,902
4.95%|||||Peter Fragiskatos|-| style="background-color:whitesmoke" |London West|||Arielle Kayabaga
25,308
36.88%||Rob Flack
22,273
32.46%||Shawna Lewkowitz
16,858
24.57%||||Mike McMullen
3,409
4.97%||Jacques Y. Boudreau (Libert.)
773
1.13%|||Kate Young|-| style="background-color:whitesmoke" |Sarnia—Lambton||Lois Nantais
10,975
19.29%|||Marilyn Gladu
26,292
46.21%||Adam Kilner
11,990
21.07%||Stefanie Bunko
848
1.49%||Brian Everaert
6,359
11.18%||Tom Laird (CHP)
435
0.76%|||Marilyn Gladu|-| style="background-color:whitesmoke" |Windsor—Tecumseh|||Irek Kusmierczyk
18,134
31.83%||Kathy Borrelli
14,605
25.63%||Cheryl Hardcastle
17,465
30.65%||Henry Oulevey
682
1.20%||Victor Green
5,927
10.40%||Laura Chesnik (M-L)
164
0.29%|||Irek Kusmierczyk|-| style="background-color:whitesmoke" |Windsor West||Sandra Pupatello
13,524
27.77%||Anthony Orlando
9,415
19.34%|||Brian Masse
21,541
44.24%||||Matthew Giancola
4,060
8.34%||Margaret Villamizar (M-L)
153
0.31%|||Brian Masse|}
See main article: 2019 Canadian federal election. |-| style="background-color:whitesmoke" |Chatham-Kent—Leamington||Katie Omstead
16,899
31.24%|||Dave Epp
25,359
46.88%||Tony Walsh
8,229
15.21%||Mark Vercouteren
2,233
4.13%||John Balagtas
1,061
1.96%||Paul Coulbeck (Mar.)
307
0.57%|||Dave Van Kesteren†|-| style="background-color:whitesmoke" |Elgin—Middlesex—London||Pam Armstrong
14,324
23.20%|||Karen Vecchio
31,026
50.24%||Bob Hargreaves
11,019
17.84%||Ericha Hendel
3,562
5.77%||Donald Helkaa
956
1.55%||Peter Redecop (CHP)
618
1.00%
Richard Styve (Libert.)
249
0.40%|||Karen Vecchio|-| style="background-color:whitesmoke" |Essex||Audrey Festeryga
12,987
19.02%|||Chris Lewis
28,274
41.40%||Tracey Ramsey
23,603
34.56%||Jennifer Alderson
2,173
3.18%||Bill Capes
1,251
1.83%|||||Tracey Ramsey|-| style="background-color:whitesmoke" |Lambton—Kent—Middlesex||Jesse McCormick
14,814
25.36%|||Lianne Rood
28,651
49.05%||Dylan Mclay
9,355
16.02%||Anthony Li
3,463
5.93%||Bria Atkins
1,804
3.09%||Rob Lalande (VCP)
325
0.56%|||Bev Shipley†|-| style="background-color:whitesmoke" |London—Fanshawe||Mohamed Hammoud
14,924
26.85%||Michael van Holst
13,770
24.78%|||Lindsay Mathyssen
22,671
40.79%||Tom Cull
2,781
5.00%||Bela Kosoian
1,132
2.04%||Stephen Campbell (Ind.)
297
0.53%|||Irene Mathyssen†|-| style="background-color:whitesmoke" |London North Centre|||Peter Fragiskatos
27,247
42.75%||Sarah Bokhari
15,066
23.64%||Dirka Prout
14,887
23.36%||Carol Dyck
4,872
7.64%||Salim Mansur
1,532
2.40%||Clara Sorrenti (Comm.)
137
0.21%|||Peter Fragiskatos|-| style="background-color:whitesmoke" |London West|||Kate Young
30,622
42.96%||Liz Snelgrove
19,910
27.93%||Shawna Lewkowitz
15,220
21.35%||Mary Ann Hodge
3,827
5.37%||Mike Mcmullen
1,171
1.64%||Jacques Boudreau (Libert.)
523
0.73%|||Kate Young|-| style="background-color:whitesmoke" |Sarnia—Lambton||Carmen Lemieux
12,041
20.79%|||Marilyn Gladu
28,623
49.42%||Adam Kilner
12,644
21.83%||Peter Robert Smith
2,490
4.30%||Brian Everaert
1,587
2.74%||Thomas Laird (CHP)
531
0.92%|||Marilyn Gladu|-| style="background-color:whitesmoke" |Windsor—Tecumseh|||Irek Kusmierczyk
19,046
33.44%||Leo Demarce
15,851
27.83%||Cheryl Hardcastle
18,417
32.33%||Giovanni Abati
2,177
3.82%||Dan Burr
1,279
2.25%||Laura Chesnik (M-L)
187
0.33%|||Cheryl Hardcastle|-| style="background-color:whitesmoke" |Windsor West||Sandra Pupatello
18,878
36.33%||Henry Lau
9,925
19.10%|||Brian Masse
20,800
40.03%||Quinn Hunt
1,325
2.55%||Darryl Burrell
958
1.84%||Margaret Villamizar (M-L)
76
0.15%|||Brian Masse|}
See main article: 2015 Canadian federal election.
See main article: 2011 Canadian federal election.
See main article: 2008 Canadian federal election.
See main article: 2006 Canadian federal election.
See main article: 2004 Canadian federal election.
See main article: 2000 Canadian federal election.