Founded in 1792, Jefferson County is one of 95 counties in the state of Tennessee. Historically, Jefferson County was formed from Greene and Hawkins counties. The city of Dandridge is the county seat. With FIPS code of 89, Jefferson County has a population of 55,624 and area of 274 square miles (710 km2).
List of all cities in Jefferson County, TN alphabetically
| City/Town | Postal Code | Area Code |
| Baneberry, TN | 37890 | 865 |
| Dandridge, TN | 37725 | 865 |
| Jeff City, TN | 37760 | 865 |
| Jefferson City, TN | 37760 | 865 |
| New Market, TN | 37820 | 865 |
| Strawberry Plns, TN | 37871 | 865 |
| White Pine, TN | 37890 | 865 |