Founded in 1796, Grainger County is one of 95 counties in the state of Tennessee. Historically, Grainger County was formed from Hawkins and Knox counties. The city of Rutledge is the county seat. With FIPS code of 57, Grainger County has a population of 23,763 and area of 280 square miles (725 km2).
List of all cities in Grainger County, TN alphabetically
| City/Town | Postal Code | Area Code |
| Bean Station, TN | 37708 | 865 |
| Blaine, TN | 37709 | 865 |
| Powder Springs, TN | 37848 | 865 |
| Rutledge, TN | 37861 | 865 |
| Tate Springs, TN | 37708 | 865 |
| Thorn Hill, TN | 37881 | 865 |
| Treadway, TN | 37881 | 865 |
| Washburn, TN | 37888 | 865 |