- Troy
- Tiegs Corner
- Taber
- Tahoe
- Talache
- Talache Landing
- Talmage
- Tamarack
- Tammany
- Taplin
- Taylor
- Taylorville
- Teakean
- Telegraph Hill
- Telluride
- Tendoy
- Tenmile Summer Home Area
- Terreton
- Thama
- Thatcher
- The Cedars
- The String
- Thiard
- Thomas
- Thorenson
- Thornton
- Three Creek
- Threemile Corner
- Threemile Crossing
- Tikura