David McGuinty (Liberal) won Ottawa South in the April 28, 2025 federal election with 65.2% of the vote, 25,378 votes (38.1 points) ahead of Blair Turner (Conservative). 66,564 valid votes were counted in this Ontario riding.
| Candidate | Votes | Share |
|---|---|---|
| David McGuinty · Liberalelectedincumbent Parliamentarian · Ottawa, Ont. | 43,388 | 65.2% |
| Blair Turner · Conservative Police Officer · Greely, Ont. | 18,010 | 27.1% |
| Hena Masjedee · NDP Federal Public Servant / Policy Analyst · Ottawa, Ont. | 4,017 | 6% |
| Nira Dookeran · Green Retired · Ottawa, Ont. | 642 | 1% |
| Alex Perrier · Christian Heritage Party Grocery Clerk · Ottawa, Ont. | 259 | 0.4% |
| William Cooper · Rhinoceros Small Business Owner · Ottawa, Ont. | 155 | 0.2% |
| John Redins · Canadian Future Party 50/50 Ticket Seller · Ottawa, Ont. | 93 | 0.1% |
Source: Elections Canada, official results of the April 28, 2025 general election. Candidates marked as incumbents follow Elections Canada's table. Results are not updated for by-elections or floor-crossings since; changes we have recorded are listed above the results.