# Thunder Bay—Atikokan (provincial electoral district)

Thunder Bay—Atikokan is a provincial electoral district in northwestern Ontario, Canada, that has been represented in the Legislative Assembly of Ontario since 1999.
The electoral district was created from Port Arthur, Fort William, Lake Nipigon and Rainy River in 1999 when Ontario was divided into the same electoral districts as those used for federal electoral purposes. They were redistributed whenever a readjustment took place at the federal level.
In 2005, legislation was passed by the Legislature to divide Ontario into 107 electoral districts, beginning with the next provincial election in 2007. The eleven northern electoral districts, including Thunder Bay—Atikokan, are those defined for federal purposes in 1996, based on the 1991 census (except for a minor boundary adjustment). The 96 southern electoral districts are those defined for federal electoral purposes in 2003, based on the 2001 census. Without this legislation, the number of electoral districts in northern Ontario would have been reduced from eleven to ten.

## Members

Thunder Bay—Atikokan :
| Assembly | Years | Member | Party |
| Riding created from Port Arthur, Fort William, Lake Nipigon and Rainy River |||||
| 37th | 1999–2003 | Lyn McLeod | Liberal |
| 38th | 2003–2007 | Bill Mauro | Liberal |
| 39th | 2007–2011 | Bill Mauro | Liberal |
| 40th | 2011–2014 | Bill Mauro | Liberal |
| 41st | 2014–2018 | Bill Mauro | Liberal |
| 42nd | 2018–2022 | Judith Monteith-Farrell | New Democratic |
| 43rd | 2022–2025 | Kevin Holland | Progressive Conservative |
| 44th | 2025–present | Kevin Holland | Progressive Conservative |

## Election results

2025 Ontario general election :
| Party | Candidate | Votes | % | ±% |
| | Progressive Conservative | Kevin Holland | 13,727 | 45.71 | +9.40 |
| | New Democratic | Judith Monteith-Farrell | 7,766 | 25.86 | –7.07 |
| | Liberal | Stephen Margarit | 7,398 | 24.63 | +0.24 |
| | New Blue | Martin Tempelman | 497 | 1.66 | –0.33 |
| | Green | Eric Arner | 457 | 1.52 | –1.42 |
| | Northern Ontario | K.C. Jones | 184 | 0.61 | +0.09 |
| Total valid votes/expense limit | Total valid votes/expense limit | Total valid votes/expense limit | 30,029 | 99.30 | –0.09 |
| Total rejected, unmarked, and declined ballots | Total rejected, unmarked, and declined ballots | Total rejected, unmarked, and declined ballots | 213 | 0.70 | +0.09 |
| Turnout | Turnout | Turnout | 30,242 | 49.81 | +6.72 |
| Eligible voters | Eligible voters | Eligible voters | 60,715 |
| | Progressive Conservative hold | Progressive Conservative hold | Swing | Swing | +8.24 |
| Source: Elections Ontario |||||||
vte2022 Ontario general election :
| Party | Candidate | Votes | % | ±% | Expenditures |
| | Progressive Conservative | Kevin Holland | 9,657 | 36.31 | +13.08 | $57,863 |
| | New Democratic | Judith Monteith-Farrell | 8,759 | 32.93 | −3.33 | $84,682 |
| | Liberal | Rob Barrett | 6,486 | 24.39 | −11.62 | $43,988 |
| | Green | Eric Arner | 781 | 2.94 | +0.23 | $509 |
| | New Blue | David Tommasini | 529 | 1.99 | | $2,767 |
| | Ontario Party | Dan Criger | 248 | 0.93 | | $0 |
| | Northern Ontario Heritage | Kenneth Jones | 138 | 0.52 | −0.92 | $0 |
| Total valid votes/expense limit | Total valid votes/expense limit | Total valid votes/expense limit | 26,598 | 99.39 | +0.36 | $97,107 |
| Total rejected, unmarked, and declined ballots | Total rejected, unmarked, and declined ballots | Total rejected, unmarked, and declined ballots | 163 | 0.61 | -0.36 |
| Turnout | Turnout | Turnout | 26,761 | 43.09 | -11.65 |
| Eligible voters | Eligible voters | Eligible voters | 61,879 |
| | Progressive Conservative gain from New Democratic | Progressive Conservative gain from New Democratic | Swing | Swing | +8.20 |
| Source(s) "Summary of Valid Votes Cast for Each Candidate" (PDF). Elections Ontario. 2022. Archived from the original on 2023-05-18."Statistical Summary by Electoral District" (PDF). Elections Ontario. 2022. Archived from the original on 2023-05-21. |||||||
2018 Ontario general election :
| Party | Candidate | Votes | % | ±% | Expenditures |
| | New Democratic | Judith Monteith-Farrell | 11,793 | 36.26 | +8.15 | $29,425 |
| | Liberal | Bill Mauro | 11,712 | 36.01 | -16.97 | $59,096 |
| | Progressive Conservative | Brandon Postuma | 7,555 | 23.23 | +10.04 | $34,193 |
| | Green | John Northey | 880 | 2.71 | -0.66 | $81 |
| | Northern Ontario | David Bruno | 469 | 1.44 | +0.99 | $0 |
| | Libertarian | Dorothy Snell | 116 | 0.36 | -1.55 |
| Total valid votes | Total valid votes | Total valid votes | 32,525 | 99.03 | –0.17 |
| Total rejected, unmarked and declined ballots | Total rejected, unmarked and declined ballots | Total rejected, unmarked and declined ballots | 317 | 0.97 | +0.17 |
| Turnout | Turnout | Turnout | 32,842 | 54.74 | +5.72 |
| Eligible voters | Eligible voters | Eligible voters | 59,996 |
| | New Democratic gain from Liberal | New Democratic gain from Liberal | Swing | Swing | +12.56 |
| Source: Elections Ontario |||||||
2014 Ontario general election :
| Party | Candidate | Votes | % | ±% |
| | Liberal | Bill Mauro | 15,176 | 52.98 | +14.01 |
| | New Democratic | Mary Kozorys | 8,052 | 28.11 | -9.20 |
| | Progressive Conservative | Harold Wilson | 3,779 | 13.19 | -8.77 |
| | Green | John Northey | 964 | 3.37 | +1.94 |
| | Libertarian | Joe Talarico | 547 | 1.91 | |
| | Northern Ontario Heritage | Ed Deibel | 129 | 0.45 | |
| Total valid votes | Total valid votes | Total valid votes | 28,647 | 99.20 |
| Total rejected, unmarked and declined ballots | Total rejected, unmarked and declined ballots | Total rejected, unmarked and declined ballots | 231 | 0.80 |
| Turnout | Turnout | Turnout | 28,878 | 49.02 |
| Eligible voters | Eligible voters | Eligible voters | 58,908 |
| | Liberal hold | Liberal hold | Swing | Swing | +11.56 |
| Source: Elections Ontario |||||||
2011 Ontario general election :
| Party | Candidate | Votes | % | ±% |
| | Liberal | Bill Mauro | 10,319 | 38.97 | +1.28 |
| | New Democratic | Mary Kozorys | 9,881 | 37.31 | -0.21 |
| | Progressive Conservative | Fred Gilbert | 5,815 | 21.96 | +1.55 |
| | Green | Jonathan Milnes | 379 | 1.43 | -2.95 |
| | Independent | Marvin Robert McMenemy | 86 | 0.32 | |
| Total valid votes | Total valid votes | Total valid votes | 26,480 | 100.00 |
| Total rejected, unmarked and declined ballots | Total rejected, unmarked and declined ballots | Total rejected, unmarked and declined ballots | 98 | 0.37 |
| Turnout | Turnout | Turnout | 26,578 | 46.61 |
| Eligible voters | Eligible voters | Eligible voters | 57,027 |
| | Liberal hold | Liberal hold | Swing | Swing | +0.75 |
| Source: Elections Ontario |||||||
2007 Ontario general election :
| Party | Candidate | Votes | % | ±% |
| | Liberal | Bill Mauro | 10,928 | 37.69 | -20.55 |
| | New Democratic | John Rafferty | 10,878 | 37.52 | +15.88 |
| | Progressive Conservative | Rebecca Johnson | 5,918 | 20.41 | +2.78 |
| | Green | Russ Aegard | 1,270 | 4.38 | +1.89 |
| Total valid votes | Total valid votes | Total valid votes | 28,994 | 100.00 |
2003 Ontario general election :
| Party | Candidate | Votes | % | ±% |
| | Liberal | Bill Mauro | 17,735 | 58.25 | -5.78 |
| | New Democratic | John Rafferty | 6,582 | 21.62 | +4.86 |
| | Progressive Conservative | Brian McKinnon | 5,365 | 17.62 | -1.59 |
| | Green | Kristin Boyer | 762 | 2.5 | |
| Total valid votes | Total valid votes | Total valid votes | 30,444 | 100.00 |
1999 Ontario general election :
| Party | Candidate | Votes | % |
| | Liberal | Lyn McLeod | 20,268 | 64.03 |
| | Progressive Conservative | John Henderson | 6,081 | 19.21 |
| | New Democratic | Jack Drewes | 5,304 | 16.76 |
| Total valid votes | Total valid votes | Total valid votes | 31,653 | 100.00 |

## 2007 electoral reform referendum

2007 Ontario electoral reform referendum :
| Side | Votes | % |
| First Past the Post | 19,153 | 67.9 |
| Mixed member proportional | 9,056 | 32.1 |
| Total valid votes | 28,209 | 100.0 |