| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Tradersville | city | Ohio | United States | 40.00 | -83.50 | 1099 | |
| Trail | city | Ohio | United States | 40.59 | -81.71 | 1095 | |
| Trail Run (historical) | city | Ohio | United States | 39.62 | -81.05 | 830 | |
| Trailer City | city | Ohio | United States | 40.79 | -81.48 | 1099 | |
| Trailer Estates | city | Ohio | United States | 40.28 | -81.87 | 830 | |
| Trailer Village | city | Ohio | United States | 41.11 | -81.49 | 1030 | |
| Trailerville Mobile Home Park | city | Ohio | United States | 40.87 | -82.29 | 997 | |
| Trails End | city | Ohio | United States | 40.19 | -83.05 | 830 | |
| Tranquility | city | Ohio | United States | 38.96 | -83.53 | 830 | |
| Treadway (historical) | city | Ohio | United States | 41.71 | -83.88 | 830 | |
| Treaton | city | Ohio | United States | 40.83 | -82.23 | 997 | |
| Trebein | city | Ohio | United States | 39.71 | -83.99 | 830 | |
| Tree Meadows Mobile Home Park | city | Ohio | United States | 41.49 | -84.56 | 830 | |
| Tremleys (historical) | city | Ohio | United States | 40.03 | -81.99 | 830 | |
| Tremont | city | Ohio | United States | 41.48 | -81.68 | 830 | |
| Tremont City | city | Ohio | United States | 40.01 | -83.84 | 994 | |
| Trenton | city | Ohio | United States | 39.48 | -84.46 | 830 | |
| Triadelphia | city | Ohio | United States | 39.70 | -81.97 | 997 | |
| Trilby | city | Ohio | United States | 41.72 | -83.62 | 830 | |
| Trimble | city | Ohio | United States | 39.48 | -82.08 | 830 | |
| Trinity (historical) | city | Ohio | United States | 41.45 | -82.00 | 830 | |
| Trinway | city | Ohio | United States | 40.14 | -82.01 | 830 | |
| Triumph | city | Ohio | United States | 41.49 | -80.75 | 941 | |
| Trombley | city | Ohio | United States | 41.25 | -83.65 | 830 | |
| Tropic | city | Ohio | United States | 39.74 | -82.07 | 830 | |
| Trotwood | city | Ohio | United States | 39.80 | -84.31 | 898 | |
| Trowbridge | city | Ohio | United States | 41.58 | -83.28 | 830 | |
| Troy | city | Ohio | United States | 40.04 | -84.20 | 869 | |
| Troy Farms | city | Ohio | United States | 40.31 | -83.12 | 902 | |
| Troy Oaks Homes | city | Ohio | United States | 41.38 | -81.19 | 1187 | |
| Troy Villa Mobile Home Park | city | Ohio | United States | 41.50 | -83.47 | 830 | |
| Troyer Mobile Home Park | city | Ohio | United States | 40.11 | -83.28 | 928 | |
| Troyton | city | Ohio | United States | 40.39 | -83.08 | 898 | |
| Truetown | city | Ohio | United States | 39.45 | -82.11 | 830 | |
| Trumbull | city | Ohio | United States | 41.68 | -80.95 | 951 | |
| Trumbull Homes | city | Ohio | United States | 41.22 | -80.79 | 938 | |
| Trump | city | Ohio | United States | 40.83 | -81.35 | 1092 | |
| Truro | city | Ohio | United States | 39.93 | -82.88 | 830 |