# Northumberland—Peterborough South (federal electoral district)

Northumberland—Peterborough South (French: Northumberland—Peterborough-Sud) is a federal electoral district in Ontario.
Northumberland—Peterborough South was created by the 2012 federal electoral boundaries redistribution and was legally defined in the 2013 representation order. It came into effect upon the call of the 42nd Canadian federal election, scheduled for 19 October 2015. 77% of the riding was formed from Northumberland—Quinte West, 13% from Durham and 10% from Peterborough.
The riding was originally intended to be named Northumberland—Pine Ridge.
Under the 2022 Canadian federal electoral redistribution the riding will lose its territory in Peterborough County, the townships of Asphodel-Norwood and Otonabee-South Monaghan, to the Peterborough riding. As such, it will be renamed Northumberland—Clarke at the 2025 federal election.

## Geography

The riding is located in Central Ontario along Lake Ontario. It contains the entirety of Northumberland County, southern Peterborough and the eastern half of the municipality of Clarington.

## Demographics

    According to the 2021 Canadian census
Ethnic groups: 89.8% White, 5.1% Indigenous, 1.2% Black, 1.1% South Asian Languages: 92.6% English, 1.3% French Religions: 54.1% Christian (17.6% Catholic, 11.3% United Church, 7.6% Anglican, 2.4% Presbyterian, 1.8% Baptist, 1.2% Pentecostal, 12.2% Other), 43.8% None Median income: $41,600 (2020) Average income: $53,100 (2020)

## Members of Parliament

This riding has elected the following members of Parliament:
| Parliament | Years | Member | Party |
| Northumberland—Peterborough South Riding created from Durham, Northumberland—Quinte West and Peterborough |||||
| 42nd | 2015–2019 | Kim Rudd | Liberal |
| 43rd | 2019–2021 | Philip Lawrence | Conservative |
| 44th | 2021–present | Philip Lawrence | Conservative |

## Election results

vte2021 Canadian federal election :
| Party | Candidate | Votes | % | ±% | Expenditures |
| | Conservative | Philip Lawrence | 31,015 | 44.5 | +4.8 | $102,345.39 |
| | Liberal | Alison Lester | 23,336 | 33.5 | -2.7 | $114,472.38 |
| | New Democratic | Kim McArthur-Jackson | 9,809 | 14.1 | +0.2 | $7,800.16 |
| | People's | Nathan Lang | 3,813 | 5.5 | +3.4 | $7,035.54 |
| | Green | Christina Wilson | 1,764 | 2.5 | -5.5 | $3,692.08 |
| Total valid votes | Total valid votes | Total valid votes | 69,737 |
| Total rejected ballots | Total rejected ballots | Total rejected ballots | 459 |
| Turnout | Turnout | Turnout | 70,196 | 69.98 |
| Eligible voters | Eligible voters | Eligible voters | 100,308 |
| Source: Elections Canada |||||||
2021 federal election redistributed results :
| Party | Vote | % |
| Conservative | 27,553 | 43.99 |
| Liberal | 21,311 | 34.02 |
| New Democratic | 8,735 | 13.95 |
| People's | 3,430 | 5.48 |
| Green | 1,608 | 2.57 |
vte2019 Canadian federal election :
| Party | Candidate | Votes | % | ±% | Expenditures |
| | Conservative | Philip Lawrence | 27,385 | 39.7 | +0.14 | $68,864.16 |
| | Liberal | Kim Rudd | 24,977 | 36.2 | -6.31 | $83,715.67 |
| | New Democratic | Mallory MacDonald | 9,615 | 13.9 | -0.9 | $8,871.55 |
| | Green | Jeff Wheeldon | 5,524 | 8.0 | +4.87 | none listed |
| | People's | Frank Vaughan | 1,460 | 2.1 | – | $1,643.34 |
| Total valid votes/expense limit | Total valid votes/expense limit | Total valid votes/expense limit | 68,961 | 100.0 |
| Total rejected ballots | Total rejected ballots | Total rejected ballots | 484 |
| Turnout | Turnout | Turnout | 69,445 | 71.7 |
| Eligible voters | Eligible voters | Eligible voters | 96,841 |
| | Conservative gain from Liberal | Conservative gain from Liberal | Swing | Swing | +3.23 |
| Source: Elections Canada |||||||
2015 Canadian federal election :
| Party | Candidate | Votes | % | ±% | Expenditures |
| | Liberal | Kim Rudd | 27,043 | 42.51 | +21.42 | $114,323.76 |
| | Conservative | Adam Moulton | 25,165 | 39.56 | -13.80 | $135,349.14 |
| | New Democratic | Russ Christianson | 9,411 | 14.80 | -5.79 | $41,225.56 |
| | Green | Patricia Sinnott | 1,990 | 3.13 | -1.55 | $1,350.03 |
| Total valid votes/Expense limit | Total valid votes/Expense limit | Total valid votes/Expense limit | 63,609 | 100.00 | | $229,426.74 |
| Total rejected ballots | Total rejected ballots | Total rejected ballots | 267 | 0.42 | – |
| Turnout | Turnout | Turnout | 63,876 | 71.67 | – |
| Eligible voters | Eligible voters | Eligible voters | 89,128 |
| | Liberal gain from Conservative | Liberal gain from Conservative | Swing | Swing | +17.61 |
| Source: Elections Canada |||||||
2011 federal election redistributed results :
| Party | Vote | % |
| Conservative | 29,377 | 53.37 |
| Liberal | 11,611 | 21.09 |
| New Democratic | 11,331 | 20.58 |
| Green | 2,576 | 4.68 |
| Others | 154 | 0.28 |