# 1959 Ontario general election

The 1959 Ontario general election was held on June 11, 1959, to elect the 98 members of the 26th Legislative Assembly of Ontario (Members of Provincial Parliament, or "MPPs") of the Province of Ontario.
The Ontario Progressive Conservative Party, led by Leslie Frost, won a sixth consecutive term in office, and maintained its majority in the legislature, although it lost 12 of the 83 seats it had won in the previous election.
The Ontario Liberal Party, led by John Wintermeyer, increased its caucus from 11 to 22 members, and continued in the role of official opposition. Liberal-Labour MPP Albert Wren was re-elected and continued to sit with the Liberal caucus. Wren died in 1961 and was succeeded in a by-election by Robert Gibson.
The social democratic Co-operative Commonwealth Federation (CCF), led by Donald C. MacDonald, won two additional seats, for a total of five.

## Campaign

Riding contests, by number of candidates (1959) :
| Candidates | PC | Lib | LL | CCF | Lab-CCF | Lab-Pr | SC | Ind | I-PC | WC | Total |
| 2 | 17 | 17 | | | | | | | | | 34 |
| 3 | 64 | 63 | 1 | 63 | 1 | | | | | | 192 |
| 4 | 15 | 15 | | 15 | | 7 | 4 | 2 | 1 | 1 | 60 |
| 5 | 2 | 2 | | 2 | | 2 | 1 | | 1 | | 10 |
| Total | 98 | 97 | 1 | 80 | 1 | 9 | 5 | 2 | 2 | 1 | 296 |

## Results

Elections to the 26th Parliament of Ontario (1959) :
| Political party | Political party | Party leader | MPPs | MPPs | MPPs | MPPs | MPPs | Votes | Votes | Votes |
| Political party | Political party | Party leader | Candidates | 1955 | Dissol. | 1959 | ± | # | % | ± (pp) |
| | Progressive Conservative | Leslie Frost | 98 | 83 | | 71 | 12 | 868,815 | 46.15% | 1.91 |
| | Liberal | John Wintermeyer | 97 | 10 | | 21 | 11 | 682,589 | 36.26% | 3.46 |
| | Co-operative Commonwealth | Donald C. MacDonald | 80 | 3 | | 5 | 2 | 313,834 | 16.67% | 0.13 |
| | Liberal–Labour | | 1 | 1 | | 1 | | 6,559 | 0.35% | 0.06 |
| | Independent-PC | | 2 | 1 | | – | 1 | 2,119 | 0.11% | 0.29 |
| | Labor–Progressive | Bruce Magnuson | 9 | – | – | – | | 4,304 | 0.23% | 0.96 |
| | Social Credit | Edgar Shipley Birrell | 5 | – | – | – | | 1,740 | 0.09% | New |
| | Labour-CCF | | 1 | – | – | – | | 1,512 | 0.08% | New |
| | Independent | | 2 | – | – | – | | 832 | 0.04% | 0.48 |
| | White Canada | | 1 | – | – | – | | 268 | 0.01% | New |
| | Independent-Liberal | | | – | – | – | | Did not campaign | Did not campaign | Did not campaign |
| | Independent-Social Credit | | | – | – | – | | Did not campaign | Did not campaign | Did not campaign |
| | Socialist-Labour | | | – | – | – | | Did not campaign | Did not campaign | Did not campaign |
| | Vacant | | | | | | | | | |
| Total | Total | Total | 296 | 98 | 98 | 98 | | 1,882,572 | 100.00% | |
| Blank and invalid ballots | Blank and invalid ballots | Blank and invalid ballots | Blank and invalid ballots | Blank and invalid ballots | Blank and invalid ballots | Blank and invalid ballots | Blank and invalid ballots | 21,272 | | |
| Registered voters / turnout | Registered voters / turnout | Registered voters / turnout | Registered voters / turnout | Registered voters / turnout | Registered voters / turnout | Registered voters / turnout | Registered voters / turnout | 3,187,801 | 59.72% | 1.68 |
Seats and popular vote by party :
| Party | Seats | Votes | Change (pp) | Change (pp) |
| █ Progressive Conservative | 71 / 98 | 46.15% | -1.91 | |
| █ Liberal | 21 / 98 | 36.26% | 3.46 | 3.46 |
| █ Co-operative Commonwealth | 5 / 98 | 16.67% | 0.13 | 0.13 |
| █ Other | 1 / 98 | 0.92% | -1.68 | |

### Synopsis of results

Results by riding - 1959 Ontario general election :
| Riding | Winning party | Winning party | Winning party | Winning party | Winning party | Winning party | Winning party | Winning party | Turnout | Votes | Votes | Votes | Votes | Votes | Votes | Votes | Votes |
| Name | 1955 | 1955 | Party | Party | Votes | Share | Margin # | Margin % | Turnout | PC | Lib/LL | CCF | Lab-Pr | SC | Ind | Oth | Total |
| Algoma—Manitoulin | | PC | | PC | 8,055 | 41.20% | 1,046 | 5.35% | 62.75% | 8,055 | 7,009 | 4,488 | – | – | – | – | 19,552 |
| Brant | | Lib | | Lib | 8,512 | 47.42% | 1,166 | 6.50% | 59.81% | 7,346 | 8,512 | 2,092 | – | – | – | – | 17,950 |
| Brantford | | Lib | | Lib | 8,011 | 45.08% | 1,460 | 8.22% | 71.17% | 6,551 | 8,011 | 3,208 | – | – | – | – | 17,770 |
| Bruce | | Lib | | Lib | 8,940 | 61.52% | 3,348 | 23.04% | 77.24% | 5,592 | 8,940 | – | – | – | – | – | 14,532 |
| Carleton | | PC | | PC | 6,410 | 59.85% | 2,662 | 24.86% | 49.24% | 6,410 | 3,748 | 373 | – | 179 | – | – | 10,710 |
| Cochrane North | | PC | | PC | 5,596 | 45.03% | 1,319 | 10.61% | 68.18% | 5,596 | 4,277 | 2,555 | – | – | – | – | 12,428 |
| Cochrane South | | PC | | PC | 12,247 | 48.66% | 4,659 | 18.51% | 66.66% | 12,247 | 4,750 | 7,588 | 585 | – | – | – | 25,170 |
| Dufferin—Simcoe | | PC | | PC | 8,390 | 68.90% | 4,603 | 37.80% | 52.70% | 8,390 | 3,787 | – | – | – | – | – | 12,177 |
| Durham | | PC | | PC | 6,946 | 50.87% | 1,974 | 14.46% | 64.13% | 6,946 | 4,972 | 1,736 | – | – | – | – | 13,654 |
| Elgin | | PC | | PC | 9,157 | 51.60% | 1,833 | 10.33% | 62.73% | 9,157 | 7,324 | 963 | – | 302 | – | – | 17,746 |
| Essex North | | Lib | | Lib | 12,412 | 42.00% | 3,584 | 12.13% | 66.91% | 8,828 | 12,412 | 8,313 | – | – | – | – | 29,553 |
| Essex South | | PC | | PC | 8,356 | 50.78% | 1,001 | 6.08% | 65.35% | 8,356 | 7,355 | 743 | – | – | – | – | 16,454 |
| Fort William | | PC | | Lib | 9,255 | 42.09% | 1,336 | 6.08% | 74.77% | 7,919 | 9,255 | 4,434 | – | – | 382 | – | 21,990 |
| Frontenac—Addington | | PC | | PC | 6,834 | 56.81% | 2,238 | 18.60% | 67.37% | 6,834 | 4,596 | 600 | – | – | – | – | 12,030 |
| Glengarry | | PC | | PC | 4,575 | 50.38% | 69 | 0.76% | 70.61% | 4,575 | 4,506 | – | – | – | – | – | 9,081 |
| Grenville—Dundas | | PC | | PC | 8,462 | 68.78% | 4,621 | 37.56% | 56.00% | 8,462 | 3,841 | – | – | – | – | – | 12,303 |
| Grey North | | PC | | PC | 8,167 | 55.03% | 3,153 | 21.25% | 70.93% | 8,167 | 5,014 | 1,659 | – | – | – | – | 14,840 |
| Grey South | | Lib | | Lib | 6,106 | 52.43% | 565 | 4.85% | 75.01% | 5,541 | 6,106 | – | – | – | – | – | 11,647 |
| Haldimand—Norfolk | | PC | | PC | 13,007 | 59.37% | 4,104 | 18.73% | 64.25% | 13,007 | 8,903 | – | – | – | – | – | 21,910 |
| Halton | | PC | | PC | 10,385 | 43.23% | 727 | 3.03% | 50.49% | 10,385 | 9,658 | 3,977 | – | – | – | – | 24,020 |
| Hamilton Centre | | PC | | PC | 7,287 | 39.76% | 1,314 | 7.17% | 49.97% | 7,287 | 4,602 | 5,973 | 467 | – | – | – | 18,329 |
| Hamilton East | | PC | | CCF | 7,805 | 41.61% | 1,017 | 5.42% | 54.90% | 6,788 | 3,574 | 7,805 | 591 | – | – | – | 18,758 |
| Hamilton—Wentworth | | PC | | PC | 10,453 | 56.55% | 5,958 | 32.24% | 56.98% | 10,453 | 4,495 | 3,535 | – | – | – | – | 18,483 |
| Hastings East | | PC | | PC | 6,141 | 56.95% | 1,904 | 17.66% | 65.66% | 6,141 | 4,237 | 406 | – | – | – | – | 10,784 |
| Hastings West | | PC | | PC | 10,384 | 59.06% | 4,209 | 23.94% | 58.32% | 10,384 | 6,175 | 1,023 | – | – | – | – | 17,582 |
| Huron | | PC | | PC | 7,759 | 55.84% | 1,624 | 11.69% | 76.34% | 7,759 | 6,135 | – | – | – | – | – | 13,894 |
| Huron—Bruce | | PC | | PC | 6,683 | 55.42% | 1,308 | 10.85% | 76.53% | 6,683 | 5,375 | – | – | – | – | – | 12,058 |
| Kenora | | LL | | LL | 6,559 | 44.98% | 47 | 0.32% | 69.75% | 6,512 | 6,559 | 1,512 | – | – | – | – | 14,583 |
| Kent East | | Lib | | Lib | 7,352 | 56.14% | 1,608 | 12.28% | 77.45% | 5,744 | 7,352 | – | – | – | – | – | 13,096 |
| Kent West | | PC | | PC | 9,941 | 51.15% | 446 | 2.29% | 55.95% | 9,941 | 9,495 | – | – | – | – | – | 19,436 |
| Kingston | | PC | | PC | 10,330 | 56.53% | 3,358 | 18.37% | 63.73% | 10,330 | 6,972 | 973 | – | – | – | – | 18,275 |
| Lambton East | | PC | | PC | 6,673 | 53.69% | 917 | 7.38% | 70.91% | 6,673 | 5,756 | – | – | – | – | – | 12,429 |
| Lambton West | | PC | | PC | 10,861 | 48.54% | 2,094 | 9.36% | 62.60% | 10,861 | 8,767 | 2,746 | – | – | – | – | 22,374 |
| Lanark | | PC | | PC | 8,843 | 62.24% | 3,479 | 24.49% | 64.26% | 8,843 | 5,364 | – | – | – | – | – | 14,207 |
| Leeds | | PC | | PC | 11,318 | 65.35% | 6,010 | 34.70% | 67.15% | 11,318 | 5,308 | 692 | – | – | – | – | 17,318 |
| Lincoln | | PC | | PC | 18,089 | 49.57% | 5,998 | 16.44% | 56.06% | 18,089 | 12,091 | 6,314 | – | – | – | – | 36,494 |
| London North | | PC | | PC | 9,253 | 54.97% | 3,288 | 19.53% | 54.28% | 9,253 | 5,965 | 1,615 | – | – | – | – | 16,833 |
| London South | | PC | | PC | 9,888 | 50.71% | 2,840 | 14.56% | 49.95% | 9,888 | 7,048 | 2,564 | – | – | – | – | 19,500 |
| Middlesex North | | PC | | PC | 6,452 | 62.34% | 2,907 | 28.09% | 65.99% | 6,452 | 3,545 | 353 | – | – | – | – | 10,350 |
| Middlesex South | | PC | | PC | 9,317 | 55.98% | 3,124 | 18.77% | 59.45% | 9,317 | 6,193 | 1,132 | – | – | – | – | 16,642 |
| Muskoka | | PC | | PC | 5,995 | 56.47% | 2,166 | 20.40% | 71.63% | 5,995 | 3,829 | 793 | – | – | – | – | 10,617 |
| Niagara Falls | | PC | | Lib | 12,403 | 52.07% | 4,345 | 18.24% | 59.22% | 8,058 | 12,403 | 3,357 | – | – | – | – | 23,818 |
| Nickel Belt | | PC | | PC | 8,244 | 36.86% | 453 | 2.03% | 71.16% | 8,244 | 7,791 | 6,333 | – | – | – | – | 22,368 |
| Nipissing | | PC | | Lib | 10,390 | 49.91% | 1,870 | 8.98% | 62.87% | 8,520 | 10,390 | 1,908 | – | – | – | – | 20,818 |
| Northumberland | | PC | | PC | 10,322 | 58.28% | 3,341 | 18.87% | 79.32% | 10,322 | 6,981 | 407 | – | – | – | – | 17,710 |
| Ontario | | PC | | PC | 9,018 | 59.67% | 4,822 | 31.90% | 62.69% | 9,018 | 4,196 | 1,900 | – | – | – | – | 15,114 |
| Oshawa | | CCF | | CCF | 10,243 | 41.98% | 1,600 | 6.56% | 56.87% | 8,643 | 5,513 | 10,243 | – | – | – | – | 24,399 |
| Ottawa East | | PC | | PC | 7,965 | 49.27% | 313 | 1.94% | 50.87% | 7,965 | 7,652 | 548 | – | – | – | – | 16,165 |
| Ottawa South | | PC | | PC | 12,989 | 51.66% | 1,870 | 7.44% | 56.34% | 12,989 | 11,119 | 1,037 | – | – | – | – | 25,145 |
| Ottawa West | | PC | | PC | 8,505 | 51.44% | 1,444 | 8.73% | 58.29% | 8,505 | 7,061 | 969 | – | – | – | – | 16,535 |
| Oxford | | Lib | | Lib | 11,414 | 47.39% | 216 | 0.90% | 68.65% | 11,198 | 11,414 | 1,475 | – | – | – | – | 24,087 |
| Parry Sound | | PC | | PC | 6,540 | 57.81% | 3,044 | 26.91% | 71.19% | 6,540 | 3,496 | 1,277 | – | – | – | – | 11,313 |
| Peel | | PC | | PC | 13,278 | 42.98% | 1,203 | 3.89% | 59.45% | 13,278 | 12,075 | 5,537 | – | – | – | – | 30,890 |
| Perth | | PC | | PC | 11,791 | 51.70% | 2,458 | 10.78% | 68.36% | 11,791 | 9,333 | 1,681 | – | – | – | – | 22,805 |
| Peterborough | | PC | | PC | 13,984 | 58.17% | 6,009 | 25.00% | 58.23% | 13,984 | 7,975 | 1,834 | – | 246 | – | – | 24,039 |
| Port Arthur | | PC | | PC | 10,881 | 40.88% | 2,022 | 7.60% | 70.89% | 10,881 | 8,859 | 6,874 | – | – | – | – | 26,614 |
| Prescott | | PC | | PC | 6,587 | 58.76% | 1,964 | 17.52% | 69.19% | 6,587 | 4,623 | – | – | – | – | – | 11,210 |
| Prince Edward—Lennox | | PC | | PC | 7,249 | 61.75% | 2,758 | 23.49% | 58.08% | 7,249 | 4,491 | – | – | – | – | – | 11,740 |
| Rainy River | | PC | | PC | 4,896 | 52.57% | 2,283 | 24.51% | 72.26% | 4,896 | 1,804 | 2,613 | – | – | – | – | 9,313 |
| Renfrew North | | PC | | PC | 8,448 | 49.55% | 1,118 | 6.56% | 68.64% | 8,448 | 7,330 | 1,270 | – | – | – | – | 17,048 |
| Renfrew South | | I-PC | | PC | 8,411 | 56.96% | 2,055 | 13.92% | 79.90% | 8,411 | 6,356 | – | – | – | – | – | 14,767 |
| Russell | | PC | | PC | 13,940 | 54.18% | 3,445 | 13.39% | 52.82% | 13,940 | 10,495 | 1,294 | – | – | – | – | 25,729 |
| Stormont | | Lib | | Lib | 12,109 | 62.63% | 4,884 | 25.26% | 62.87% | 7,225 | 12,109 | – | – | – | – | – | 19,334 |
| Sault Ste. Marie | | PC | | PC | 8,260 | 40.10% | 1,305 | 6.33% | 59.76% | 8,260 | 6,955 | 5,386 | – | – | – | – | 20,601 |
| Simcoe Centre | | PC | | PC | 8,625 | 52.92% | 2,240 | 13.74% | 62.63% | 8,625 | 6,385 | 1,287 | – | – | – | – | 16,297 |
| Simcoe East | | PC | | PC | 8,631 | 57.28% | 4,220 | 28.01% | 61.88% | 8,631 | 4,411 | 1,144 | – | – | – | 882 | 15,068 |
| Sudbury | | PC | | Lib | 10,904 | 44.19% | 3,143 | 12.74% | 68.56% | 7,761 | 10,904 | 6,008 | – | – | – | – | 24,673 |
| Temiskaming | | PC | | PC | 4,327 | 41.11% | 1,117 | 10.61% | 75.88% | 4,327 | 3,210 | 2,989 | – | – | – | – | 10,526 |
| Victoria | | PC | | PC | 11,117 | 73.98% | 8,233 | 54.79% | 65.92% | 11,117 | 2,884 | 1,026 | – | – | – | – | 15,027 |
| Waterloo North | | Lib | | Lib | 15,767 | 43.35% | 4,168 | 11.46% | 62.66% | 11,599 | 15,767 | 9,003 | – | – | – | – | 36,369 |
| Waterloo South | | PC | | PC | 9,075 | 42.13% | 2,425 | 11.26% | 66.43% | 9,075 | 5,816 | 6,650 | – | – | – | – | 21,541 |
| Welland | | PC | | PC | 12,915 | 47.16% | 2,729 | 9.96% | 62.44% | 12,915 | 10,186 | 4,287 | – | – | – | – | 27,388 |
| Wellington—Dufferin | | PC | | PC | 7,811 | 61.17% | 2,852 | 22.33% | 69.18% | 7,811 | 4,959 | – | – | – | – | – | 12,770 |
| Wellington South | | Lib | | Lib | 10,427 | 50.47% | 3,467 | 16.78% | 69.71% | 6,960 | 10,427 | 3,271 | – | – | – | – | 20,658 |
| Wentworth | | PC | | Lib | 9,318 | 37.41% | 945 | 3.79% | 58.07% | 8,373 | 9,318 | 7,219 | – | – | – | – | 24,910 |
| Wentworth East | | CCF | | CCF | 9,366 | 51.01% | 3,812 | 20.76% | 53.28% | 5,554 | 3,440 | 9,366 | – | – | – | – | 18,360 |
| Windsor—Walkerville | | PC | | Lib | 6,340 | 41.40% | 1,024 | 6.69% | 63.05% | 5,316 | 6,340 | 3,659 | – | – | – | – | 15,315 |
| Windsor—Sandwich | | PC | | Lib | 8,388 | 38.23% | 1,030 | 4.69% | 55.31% | 7,358 | 8,388 | 6,197 | – | – | – | – | 21,943 |
| York Centre | | PC | | Lib | 15,857 | 36.54% | 1,991 | 4.59% | 51.21% | 13,866 | 15,857 | 13,400 | – | – | – | 268 | 43,391 |
| York East | | PC | | PC | 21,827 | 47.33% | 7,545 | 16.36% | 50.17% | 21,827 | 14,282 | 9,122 | – | 881 | – | – | 46,112 |
| York—Humber | | PC | | PC | 11,850 | 44.02% | 3,305 | 12.28% | 52.58% | 11,850 | 8,545 | 6,522 | – | – | – | – | 26,917 |
| York North | | PC | | PC | 12,981 | 47.16% | 2,999 | 10.90% | 49.89% | 12,981 | 9,982 | 4,560 | – | – | – | – | 27,523 |
| York—Scarborough | | PC | | PC | 18,778 | 37.26% | 1,536 | 3.05% | 50.28% | 18,778 | 17,242 | 14,380 | – | – | – | – | 50,400 |
| York South | | CCF | | CCF | 14,478 | 46.89% | 5,303 | 17.17% | 50.06% | 9,175 | 5,531 | 14,478 | 456 | – | – | 1,237 | 30,877 |
| York West | | PC | | PC | 18,355 | 44.77% | 6,191 | 15.10% | 51.63% | 18,355 | 12,164 | 10,484 | – | – | – | – | 41,003 |
| Beaches | | PC | | PC | 7,294 | 45.90% | 2,892 | 18.20% | 57.16% | 7,294 | 4,195 | 4,402 | – | – | – | – | 15,891 |
| Bellwoods | | PC | | PC | 6,408 | 54.96% | 3,733 | 32.02% | 57.67% | 6,408 | 2,675 | 1,867 | 710 | – | – | – | 11,660 |
| Bracondale | | PC | | Lib | 4,069 | 36.59% | 391 | 3.52% | 56.40% | 3,678 | 4,069 | 2,925 | – | – | 450 | – | 11,122 |
| Dovercourt | | PC | | Lib | 5,336 | 34.74% | 218 | 1.42% | 54.46% | 5,118 | 5,336 | 4,434 | 473 | – | – | – | 15,361 |
| Eglinton | | PC | | PC | 14,805 | 57.35% | 6,950 | 26.92% | 51.93% | 14,805 | 7,855 | 3,153 | – | – | – | – | 25,813 |
| High Park | | PC | | PC | 6,414 | 37.85% | 504 | 2.97% | 57.20% | 6,414 | 5,910 | 4,229 | 394 | – | – | – | 16,947 |
| Parkdale | | PC | | Lib | 9,233 | 47.05% | 2,703 | 13.77% | 56.77% | 6,530 | 9,233 | 3,862 | – | – | – | – | 19,625 |
| Riverdale | | PC | | PC | 7,814 | 51.25% | 3,911 | 25.65% | 48.09% | 7,814 | 3,530 | 3,903 | – | – | – | – | 15,247 |
| St. Andrew | | PC | | PC | 3,787 | 42.16% | 781 | 8.70% | 53.63% | 3,787 | 3,006 | 1,655 | 402 | 132 | – | – | 8,982 |
| St. David | | PC | | PC | 5,813 | 43.70% | 1,520 | 11.43% | 51.47% | 5,813 | 4,293 | 2,971 | 226 | – | – | – | 13,303 |
| St. George | | PC | | PC | 7,960 | 54.31% | 3,047 | 20.79% | 49.17% | 7,960 | 4,913 | 1,783 | – | – | – | – | 14,656 |
| St. Patrick | | PC | | PC | 5,298 | 59.21% | 2,767 | 30.92% | 51.76% | 5,298 | 2,531 | 1,119 | – | – | – | – | 8,948 |
| Woodbine | | PC | | CCF | 7,883 | 41.87% | 267 | 1.42% | 57.44% | 7,616 | 3,330 | 7,883 | – | – | – | – | 18,829 |
* ↑ including spoilt ballots
* ↑ order is as given in EO reports
* ↑ Albert Wren was already a member of the Legislature
    = open seat
    = turnout is above provincial average
    = incumbency arose from byelection gain
    = other incumbents renominated
    = Liberal-Labour candidate
    = Labour-CCF candidate

### Analysis

Party candidates in 2nd place :
| Party in 1st place | Party in 1st place | Party in 2nd place | Party in 2nd place | Party in 2nd place | Total |
| Party in 1st place | Party in 1st place | PC | Lib | CCF | Total |
| | Progressive Conservative | | 65 | 6 | 71 |
| | Liberal | 21 | | | 21 |
| | Liberal–Labour | 1 | | | 1 |
| | Co-operative Commonwealth | 5 | | | 5 |
| Total | Total | 27 | 65 | 6 | 98 |
Candidates ranked 1st to 5th place, by party :
| Parties | 1st | 2nd | 3rd | 4th | 5th |
| █ Progressive Conservative | 71 | 27 | | | |
| █ Liberal | 21 | 65 | 11 | | |
| █ Co-operative Commonwealth | 5 | 6 | 69 | | |
| █ Liberal–Labour | 1 | | | | |
| █ Labour CCF | | | 1 | | |
| █ Labor–Progressive | | | | 8 | 1 |
| █ Social Credit | | | | 4 | 1 |
| █ Independent | | | | 2 | |
| █ Independent PC | | | | 2 | |
| █ White Canada | | | | 1 | |
Resulting composition of the 26th Legislative Assembly :
| Source | Source | Party | Party | Party | Party | Party |
| Source | Source | PC | Lib | Lib-Lab | CCF | Total |
| Seats retained | Incumbents returned | 63 | 10 | 1 | 3 | 77 |
| Seats retained | Open seats held | 7 | | | | 7 |
| Seats changing hands | Incumbents defeated | | 8 | | 2 | 10 |
| Seats changing hands | Open seats gained | | 3 | | | 3 |
| Seats changing hands | Byelection gains held | 1 | | | | 1 |
| Total | Total | 71 | 21 | 1 | 5 | 98 |

### Seats that changed hands

Elections to the 26th Parliament of Ontario – seats won/lost by party, 1955–1959 :
| Party | Party | 1955 | Gain from (loss to) | Gain from (loss to) | Gain from (loss to) | Gain from (loss to) | Gain from (loss to) | Gain from (loss to) | Gain from (loss to) | Gain from (loss to) | Gain from (loss to) | Gain from (loss to) | 1959 |
| Party | Party | 1955 | PC | PC | Lib | Lib | CCF | CCF | L-L | L-L | I-PC | I-PC | | 1959 |
| | Progressive Conservative | 83 | | | | (11) | | (2) | | | 1 | | 71 |
| | Liberal | 10 | 11 | | | | | | | | | | 21 |
| | Co-operative Commonwealth | 3 | 2 | | | | | | | | | | 5 |
| | Liberal–Labour | 1 | | | | | | | | | | | 1 |
| | Independent-PC | 1 | | (1) | | | | | | | | | – |
| Total | Total | 98 | 13 | (1) | – | (11) | – | (2) | – | – | 1 | – | 98 |
There were 14 seats that changed allegiance in the election.