Elgin—St. Thomas—London South
| Ontario electoral district | |||
|---|---|---|---|
Interactive map of riding boundaries | |||
| Federal electoral district | |||
| Legislature | House of Commons | ||
| MP |
Conservative | ||
| District created | 2023 | ||
| First contested | 2025 | ||
| Last contested | 2025 | ||
| District webpage | profile, map | ||
| Demographics | |||
| Population (2021) | 112,448 | ||
| Electors (2025) | 93,164 | ||
| Area (km²) | 2,048 | ||
| Pop. density (per km²) | 54.9 | ||
| Census division(s) | Elgin, Middlesex | ||
| Census subdivision(s) | London (part), St. Thomas, Central Elgin, Malahide, Aylmer, Bayham, West Elgin, Southwold, Dutton/Dunwich | ||
Elgin—St. Thomas—London South (French: Elgin–St. Thomas–London-Sud) is a federal electoral district in Ontario, Canada. It came into effect upon the call of the 2025 Canadian federal election.