| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Una | city | Tennessee | United States | 36.10 | -86.65 | 830 | |
| Unaka Springs | city | Tennessee | United States | 36.10 | -82.44 | 1856 | |
| Unaka Station (historical) | city | Tennessee | United States | 35.94 | -82.90 | 1669 | |
| Underwood | city | Tennessee | United States | 36.61 | -85.99 | 830 | |
| Underwood | city | Tennessee | United States | 36.00 | -83.63 | 987 | |
| Underwood Springs (historical) | city | Tennessee | United States | 36.43 | -82.18 | 2509 | |
| Unicoi | city | Tennessee | United States | 36.20 | -82.35 | 2080 | |
| Union | city | Tennessee | United States | 36.07 | -84.49 | 1669 | |
| Union | city | Tennessee | United States | 35.58 | -89.12 | 400 | |
| Union | city | Tennessee | United States | 35.01 | -84.81 | 830 | |
| Union | city | Tennessee | United States | 35.71 | -85.70 | 1082 | |
| Union | city | Tennessee | United States | 35.90 | -84.42 | 928 | |
| Union | city | Tennessee | United States | 36.35 | -83.77 | 1102 | |
| Union Central | city | Tennessee | United States | 35.96 | -88.79 | 400 | |
| Union City | city | Tennessee | United States | 36.42 | -89.06 | 337 | |
| Union Cross | city | Tennessee | United States | 35.76 | -88.45 | 830 | |
| Union Grove | city | Tennessee | United States | 35.60 | -84.57 | 1095 | |
| Union Grove | city | Tennessee | United States | 35.60 | -86.96 | 830 | |
| Union Grove | city | Tennessee | United States | 35.75 | -84.09 | 1108 | |
| Union Grove | city | Tennessee | United States | 35.94 | -83.54 | 964 | |
| Union Grove | city | Tennessee | United States | 35.09 | -84.79 | 846 | |
| Union Grove | city | Tennessee | United States | 35.59 | -84.13 | 895 | |
| Union Grove | city | Tennessee | United States | 35.50 | -84.77 | 954 | |
| Union Heights | city | Tennessee | United States | 36.18 | -83.25 | 1669 | |
| Union Hill | city | Tennessee | United States | 36.33 | -86.78 | 830 | |
| Union Hill | city | Tennessee | United States | 36.55 | -85.70 | 954 | |
| Union Hill | city | Tennessee | United States | 35.09 | -87.33 | 898 | |
| Union Hill | city | Tennessee | United States | 36.30 | -85.33 | 1669 | |
| Union Hill | city | Tennessee | United States | 36.23 | -85.63 | 984 | |
| Union Hill | city | Tennessee | United States | 35.89 | -83.55 | 997 | |
| Union Ridge | city | Tennessee | United States | 35.51 | -86.26 | 994 | |
| Union Temple | city | Tennessee | United States | 36.30 | -82.74 | 1669 | |
| Union Valley | city | Tennessee | United States | 35.92 | -83.71 | 1099 | |
| Unionville | city | Tennessee | United States | 35.62 | -86.59 | 830 | |
| Unionville | city | Tennessee | United States | 35.95 | -89.44 | 324 | |
| Unitia | city | Tennessee | United States | 35.75 | -84.18 | 902 | |
| Unity | city | Tennessee | United States | 36.48 | -85.33 | 1122 | |
| Unity | city | Tennessee | United States | 35.41 | -88.16 | 830 | |
| Upchurch | city | Tennessee | United States | 36.24 | -82.77 | 1679 | |
| Upper Holly Creek | city | Tennessee | United States | 35.11 | -87.61 | 830 | |
| Upper Mockeson | city | Tennessee | United States | 35.07 | -87.30 | 830 | |
| Upper Shady | city | Tennessee | United States | 36.50 | -81.94 | 2798 | |
| Upper Shady | city | Tennessee | United States | 36.50 | -81.94 | 2887 | |
| Upper Shell Creek | city | Tennessee | United States | 36.17 | -82.03 | 3402 | |
| Upper Sinking | city | Tennessee | United States | 35.67 | -87.65 | 830 | |
| Upper Windrock | city | Tennessee | United States | 36.09 | -84.34 | 1669 | |
| Uptonville | city | Tennessee | United States | 35.45 | -88.98 | 396 | |
| Utah | city | Tennessee | United States | 35.59 | -88.06 | 830 | |
| Utley (historical) | city | Tennessee | United States | 35.77 | -88.55 | 830 |