Founded in 1870, Trousdale County is one of 95 counties in the state of Tennessee. Historically, Trousdale County was formed from Wilson, Macon, Smith and Sumner counties. The city of Hartsville is the county seat. With FIPS code of 169, Trousdale County has a population of 12,035 and area of 114 square miles (295 km2).
List of all cities in Trousdale County, TN alphabetically
| City/Town | Postal Code | Area Code |
| Hartsville, TN | 37074 | 615 |