# Northumberland—Peterborough South (provincial electoral district)

Northumberland—Peterborough South is a provincial electoral district in Ontario, Canada. It elects one member to the Legislative Assembly of Ontario. The riding was created in 2015.

## Members of Provincial Parliament

Northumberland—Peterborough South :
| Assembly | Years | Member | Party |
| Riding created from Northumberland—Quinte West, Durham, and Prince Edward—Hastings |||||
| 42nd | 2018–2022 | David Piccini | Progressive Conservative |
| 43rd | 2022–present | David Piccini | Progressive Conservative |

## Election results

2025 Ontario general election :
| Party | Candidate | Votes | % | ±% |
| | Progressive Conservative | David Piccini | 28,502 | 52.11 | +1.18 |
| | Liberal | Dorothy Noronha | 17,705 | 32.37 | +7.43 |
| | New Democratic | Bruce Lepage | 5,097 | 9.32 | –3.80 |
| | Green | Maxwell Groves | 1,998 | 3.65 | –2.02 |
| | New Blue | Joshua Chalhoub | 717 | 1.31 | –0.95 |
| | Ontario Party | Florian Bors | 673 | 1.23 | –1.85 |
| Total valid votes/expense limit | Total valid votes/expense limit | Total valid votes/expense limit | 54,692 | 99.23 | –0.28 |
| Total rejected, unmarked, and declined ballots | Total rejected, unmarked, and declined ballots | Total rejected, unmarked, and declined ballots | 427 | 0.77 | +0.28 |
| Turnout | Turnout | Turnout | 55,119 | 53.28 | +1.56 |
| Eligible voters | Eligible voters | Eligible voters | 103,449 |
| | Progressive Conservative hold | Progressive Conservative hold | Swing | Swing | –3.13 |
| Source: Elections Ontario |||||||
vte2022 Ontario general election :
| Party | Candidate | Votes | % | ±% |
| | Progressive Conservative | David Piccini | 26,419 | 50.93 | +5.61 |
| | Liberal | Jeff Kawzenuk | 12,936 | 24.94 | +0.77 |
| | New Democratic | Kim McArthur-Jackson | 6,806 | 13.12 | −11.38 |
| | Green | Lisa Francis | 2,942 | 5.67 | +1.14 |
| | Ontario Party | Vanessa Head | 1,598 | 3.08 | |
| | New Blue | Joshua Chalhoub | 1,170 | 2.26 | |
| Total valid votes | Total valid votes | Total valid votes | 51,871 | 100.0 |
| Total rejected, unmarked, and declined ballots | Total rejected, unmarked, and declined ballots | Total rejected, unmarked, and declined ballots | 258 |
| Turnout | Turnout | Turnout | 52,129 | 51.72 |
| Eligible voters | Eligible voters | Eligible voters | 99,034 |
| | Progressive Conservative hold | Progressive Conservative hold | Swing | Swing | +2.42 |
| 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. |||||||
vte2018 Ontario general election :
| Party | Candidate | Votes | % | ±% |
| | Progressive Conservative | David Piccini | 27,386 | 45.32 | +9.78 |
| | New Democratic | Jana Papuckoski | 14,804 | 24.50 | +6.03 |
| | Liberal | Lou Rinaldi | 14,603 | 24.17 | -17.35 |
| | Green | Jeff Wheeldon | 2,740 | 4.53 | +0.27 |
| | Libertarian | John O'Keefe | 425 | 0.70 |
| | Trillium | Derek Sharp | 278 | 0.46 |
| | Stop Climate Change | Paul Cragg | 187 | 0.31 |
| Total valid votes | Total valid votes | Total valid votes | 60,423 | 100.0 |
| | Progressive Conservative notional gain from Liberal | Progressive Conservative notional gain from Liberal | Swing | Swing | +1.88 |
| Source: Elections Ontario |||||||
2014 general election redistributed results :
| Party | Vote | % |
| Liberal | 20,584 | 41.52 |
| Progressive Conservative | 17,616 | 35.54 |
| New Democratic | 9,156 | 18.47 |
| Green | 2,112 | 4.26 |
| Others | 103 | 0.21 |