- Threefoot Rock
- Tiffany Hill Corner
- Titicus
- Toilsome Hill
- Tokeneke
- Tolland
- Tolles
- Tootin' Hills
- Topstone
- Torringford
- Torrington
- Totoket
- Town Hill
- Town Landing
- Town Plot Hill
- Tracy
- Trails Corner
- Tree Hammock
- Trumbull
- Tudor Village
- Tunxis Hill
- Turkey Cobble
- Turkey Hill
- Turks Island
- Turn of River
- Tuxis Island
- Tweed Island
- Twin Brothers
- Twin Islands
- Twin Lakes