Founded in 1823, Obion County is one of 95 counties in the state of Tennessee. Historically, Obion County was formed from Indian lands. The city of Union City is the county seat. With FIPS code of 131, Obion County has a population of 30,466 and area of 545 square miles (1,412 km2).
List of all cities in Obion County, TN alphabetically
| City/Town | Postal Code | Area Code |
| Hornbeak, TN | 38232 | 731 |
| Obion, TN | 38240 | 731 |
| Rives, TN | 38253 | 731 |
| Samburg, TN | 38254 | 731 |
| South Fulton, TN | 38257 | 731 |
| Troy, TN | 38260 | 731 |
| Union City, TN | 38261 | 731 |
| 38281 | 731 | |
| Woodland Mills, TN | 38271 | 731 |