| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Ta'agan Point | city | Connecticut | United States | 41.44 | -73.45 | 830 | |
| Taconic | city | Connecticut | United States | 42.04 | -73.41 | 830 | |
| Taftville | city | Connecticut | United States | 41.57 | -72.05 | 65 | |
| Talcottville | city | Connecticut | United States | 41.82 | -72.50 | 298 | |
| Talmadge Hill | city | Connecticut | United States | 41.12 | -73.50 | 196 | |
| Tariffville | city | Connecticut | United States | 41.91 | -72.76 | 196 | |
| Tariffville Center | city | Connecticut | United States | 41.92 | -72.76 | 200 | |
| Taylor Corners | city | Connecticut | United States | 41.45 | -73.52 | 830 | |
| Taylor Town | city | Connecticut | United States | 41.64 | -72.61 | 190 | |
| Terramuggus | city | Connecticut | United States | 41.64 | -72.47 | 830 | |
| Terryville | city | Connecticut | United States | 41.68 | -73.01 | 830 | |
| Thames View | city | Connecticut | United States | 41.39 | -72.11 | 104 | |
| Thamesville | city | Connecticut | United States | 41.51 | -72.09 | 82 | |
| The Cedars | city | Connecticut | United States | 41.93 | -73.46 | 830 | |
| The Gables | city | Connecticut | United States | 41.94 | -72.79 | 196 | |
| Thomaston | city | Connecticut | United States | 41.67 | -73.07 | 400 | |
| Thompson | city | Connecticut | United States | 41.96 | -71.86 | 830 | |
| Thompson Corner (historical) | city | Connecticut | United States | 41.28 | -72.87 | 39 | |
| Thompsonville | city | Connecticut | United States | 42.00 | -72.60 | 104 | |
| Thralltown | city | Connecticut | United States | 41.88 | -72.65 | 68 | |
| Tiffany Hill Corner | city | Connecticut | United States | 41.43 | -72.41 | 177 | |
| Titicus | city | Connecticut | United States | 41.29 | -73.50 | 830 | |
| Toilsome Hill | city | Connecticut | United States | 41.20 | -73.22 | 101 | |
| Tokeneke | city | Connecticut | United States | 41.07 | -73.47 | 22 | |
| Tolland | city | Connecticut | United States | 41.87 | -72.37 | 830 | |
| Tolles | city | Connecticut | United States | 41.64 | -73.01 | 830 | |
| Tootin' Hills | city | Connecticut | United States | 41.86 | -72.87 | 331 | |
| Topstone | city | Connecticut | United States | 41.30 | -73.45 | 830 | |
| Torringford | city | Connecticut | United States | 41.82 | -73.08 | 1059 | |
| Torrington | city | Connecticut | United States | 41.80 | -73.12 | 830 | |
| Totoket | city | Connecticut | United States | 41.33 | -72.81 | 98 | |
| Town Hill | city | Connecticut | United States | 41.85 | -73.00 | 987 | |
| Town Landing | city | Connecticut | United States | 41.30 | -72.33 | 49 | |
| Town Plot Hill | city | Connecticut | United States | 41.54 | -73.05 | 830 | |
| Tracy | city | Connecticut | United States | 41.50 | -72.81 | 98 | |
| Trails Corner | city | Connecticut | United States | 41.34 | -72.06 | 49 | |
| Trumbull | city | Connecticut | United States | 41.24 | -73.20 | 196 | |
| Tudor Village | city | Connecticut | United States | 41.75 | -72.61 | 52 | |
| Tunxis Hill | city | Connecticut | United States | 41.18 | -73.24 | 101 | |
| Turkey Cobble | city | Connecticut | United States | 41.93 | -73.19 | 997 | |
| Turkey Hill | city | Connecticut | United States | 41.62 | -72.79 | 203 | |
| Turn of River | city | Connecticut | United States | 41.10 | -73.55 | 167 | |
| Twin Lakes | city | Connecticut | United States | 42.02 | -73.39 | 830 | |
| Tyler Lake Heights | city | Connecticut | United States | 41.84 | -73.27 | 1246 | |
| Tylerville | city | Connecticut | United States | 41.45 | -72.48 | 52 |