T
- (District Municipality of Muskoka) Torrance
- (Simcoe County) Triple Bay Park
- (United Counties of Leeds and Grenville) Trevelyan
- (Hastings County) Trenton
- (Ottawa) Trend Village
- (Wellington County) Trecastle
- (Comtés unis de Prescott et Russell) Treadwell
- (Grey County) Traverston
- (Durham) Thorah Island
- (Wellington County) Tralee
- (Peterborough County) Tapley
- (Middlesex County) Telfer
- (Manitoulin District) Tehkummah
- (Bruce County) Teeswater
- (United Counties of Leeds and Grenville) Taylor
- (Durham) Taunton
- (Lanark County) Tatlock
- (Middlesex County) Tate Corners
- (Grey County) Tartan
- (Dufferin County) Tarbert
- (Comtés unis de Prescott et Russell) The Rollway
- (Ottawa) Tanglewood
- (Elgin County) Talbotville Royal
- (Simcoe County) Talbot
- (Peterborough County) Trent Lakes
- (Haliburton County) Tory Hill
- (Lennox and Addington County) Tamworth
- Thornloe
- Tillsonburg
- Tecumseh