- Terra Cotta
- Terre Haute
- Teutopolis
- Texas City
- Texas Junction
- Texico
- Thackeray
- Thawville
- Thayer
- The Burg
- The Colonnades
- The Commons
- The Cottage
- The Courts
- The Crossroads
- The Fields
- The Galena Territory
- The Grove
- The Hall
- The Knolls
- The Landings
- The Ridge
- The Willows
- Thebes
- Third Lake
- Thomas
- Thomas
- Thomasboro
- Thomasville
- Thompsonville