Cities and Communities in Southern Ontario
(check also Northern Ontario)
| Talbotville Royal | Thomasburg | Toronto |
| Tamarack | Thornbury | Torrance |
| Tamworth | Thorndale | Tory Hill |
| Tara | Thornhill | Tottenham |
| Taunton | Thornton | Townsend |
| Tavistock | Thorold | Tramore |
| Taylor Corners | Thorold South | Trent River |
| Tecumseh | Thunder Beach | Trenton |
| Teeswater | Tichborne | Trout Creek |
| Teeterville | Tilbury | Trowbridge |
| Tehkummah | Tillsonburg | Troy |
| Terra Cotta | Tincap | Tupperville |
| Terra Nova | Tiverton | Turbine |
| Teviotdale | Toanche | Turkey Point |
| Thamesford | Tobacco Lake | Tweed |
| Thamesville | Tobermory | Tyendinaga |
| Thedford | Toledo | Tyrconnell |
| Thessalon | Tolsmaville | Tyrone |