List of Ontario federal electoral districts
The Ontario federal electoral districts each elect one representative to the House of Commons. These districts are defined by Elections Canada in the 2003 Representation Order, and their boundaries are also used for provincial electoral districts, with exceptions in Northern Ontario.
Current electoral districts
The following electoral districts are currently represented in the House of Commons.
- Ajax—Pickering
- Algoma—Manitoulin—Kapuskasing
- Ancaster—Dundas—Flamborough—Westdale
- Barrie
- Beaches—East York
- Bramalea—Gore—Malton
- Brampton West
- Brampton—Springdale
- Brant
- Bruce—Grey—Owen Sound
- Burlington
- Cambridge
- Carleton—Mississippi Mills
- Chatham-Kent—Essex
- Davenport
- Don Valley East
- Don Valley West
- Dufferin—Caledon
- Durham
- Eglinton—Lawrence
- Elgin—Middlesex—London
- Essex
- Etobicoke Centre
- Etobicoke North
- Etobicoke—Lakeshore
- Glengarry—Prescott—Russell
- Guelph
- Haldimand—Norfolk
- Haliburton—Kawartha Lakes—Brock
- Halton
- Hamilton Centre
- Hamilton East—Stoney Creek
- Hamilton Mountain
- Huron—Bruce
- Kenora
- Kingston and the Islands
- Kitchener Centre
- Kitchener—Conestoga
- Kitchener—Waterloo
- Lambton—Kent—Middlesex
- Lanark—Frontenac—Lennox and Addington
- Leeds—Grenville
- London North Centre
- London West
- London—Fanshawe
- Markham—Unionville
- Mississauga East—Cooksville
- Mississauga South
- Mississauga—Brampton South
- Mississauga—Erindale
- Mississauga—Streetsville
- Nepean—Carleton
- Newmarket—Aurora
- Niagara Falls
- Niagara West—Glanbrook
- Nickel Belt
- Nipissing—Timiskaming
- Northumberland—Quinte West
- Oak Ridges—Markham
- Oakville
- Oshawa
- Ottawa Centre
- Ottawa South
- Ottawa West—Nepean
- Ottawa—Orléans
- Ottawa—Vanier
- Oxford
- Parkdale—High Park
- Parry Sound—Muskoka
- Perth—Wellington
- Peterborough
- Pickering—Scarborough East
- Prince Edward—Hastings
- Renfrew—Nipissing—Pembroke
- Richmond Hill
- St. Catharines
- St. Paul's
- Sarnia—Lambton
- Sault Ste. Marie
- Scarborough Centre
- Scarborough Southwest
- Scarborough—Agincourt
- Scarborough—Guildwood
- Scarborough—Rouge River
- Simcoe North
- Simcoe—Grey
- Stormont—Dundas—South Glengarry
- Sudbury
- Thornhill
- Thunder Bay—Rainy River
- Thunder Bay—Superior North
- Timmins—James Bay
- Toronto Centre
- Toronto—Danforth
- Trinity—Spadina
- Vaughan
- Welland
- Wellington—Halton Hills
- Whitby—Oshawa
- Willowdale
- Windsor West
- Windsor—Tecumseh
- York Centre
- York South—Weston
- York West
- York—Simcoe