| Una Gap | SE Swain County on Una Mountain near the head of Mason Branch. |
| Una Mountain | SE Swain County on the head of Una Creek. |
| Unahala | community in S Swain County on Yalaka Creek and Una Creek. |
| Unaka | community in NW Cherokee County near the junction of Copper and Beaverdam Creeks. |
| Unaka Mountain | on the Mitchell County, N.C.-Unicoi County, Tenn., line. Alt. approx. 5,190. See also Unicoi Mountains. |
| Unaka Mountains | in Avery and Mitchell Counties, N.C., and Unicoi and Carter Counties, Tenn., form the common boundary line between the two states from the Nolichucky River to the Doe River (in Tennessee). Of 40 miscellaneous maps dating from 1795 to 1930, 22 called the ridge, in whole or in part, Iron Mountains; others divide between Iron and Yellow Mountains; and 5 call them Unaka Mountains the entire distance. Unaka is a corruption of Unega, meaning "white"; it is used in the 1789 act passed by the General Assembly of North Carolina that ceded what is now the state of Tennessee to the U.S. government. |
| Uncas | community in E Mecklenburg County served by post office, 1893-1903. |
| Under Hills | See Piedmont. |
| Underwood Branch | rises in NE Cherokee County and flows SE into Webb Creek. |
| Underwood Mountain | W Henderson County, extends E in an arc between Little Willow Creek and South Fork. Alt. approx. 3,250. |