| Summit | See Elliott. |
| Summy Creek | See Sumey Creek. |
| Sumner | community in S Rowan County. |
| Sumner Township | S central Guilford County. Named for Gen. Jethro Sumner (1733-85). |
| Sumner's Mill | community in S Guilford County served by post office, 1853-59. |
| Sumpter Cabin Branch | rises in S Watauga County and flows S into Middle Fork [South Fork New River]. |
| Sun | community in E Wilson County between Toisnot Swamp and Whiteoak Swamp. Served by post office, 1898-1905. |
| Sunburst | community in S Haywood County on Lake Logan. Named because the sun rises suddenly from behind a mountain ridge. Served by post office, 1906-28. |
| Sunbury | community in E central Gates County. Alt. 39. Had its origin at nearby site of Costens Mill, which appears as Constants Mill on the Collet map, 1770. Owner of the mill moved to present site of Sunbury when the road was rerouted. Probably named for the city in Pennsylvania. |
| Sunday Branch | rises in E central Clay County and flows NW into Tusquitee Creek. |