Founded in 1796, Carter County is one of 95 counties in the state of Tennessee. Historically, Carter County was formed from Washington County. The city of Elizabethton is the county seat. With FIPS code of 19, Carter County has a population of 56,134 and area of 341 square miles (883 km2).
List of all cities in Carter County, TN alphabetically
| City/Town | Postal Code | Area Code |
| Elizabethton, TN | 37643 | 423 |
| 37644 | 423 | |
| Hampton, TN | 37658 | 423 |
| Milligan, TN | 37682 | 423 |
| Milligan College, TN | 37682 | 423 |
| Roan Mountain, TN | 37687 | 423 |
| Watauga, TN | 37694 | 423 |