| Singleton Swamp | rises in NW Beaufort County and flows NW and W into Old Ford Swamp. |
| Singletons Bay | loam-filled bay in SE Hoke County between Big Marsh Swamp and Little Marsh Swamp. |
| Sings Creek | rises in W Moore County and flows NE into Wet Creek. |
| Sinking Creek | rises in NW Haywood County and flows NE into Big Creek. |
| Sioux | community in N Yancey County on Big Creek. Served by post office, 1887-1955. Alt. 2,109. |
| Sippanaw | See Rudd. |
| Sippihaw | community in S Wake County served by post office, 1900-1902. |
| Sites | community in S Bladen County in Carvers Creek Township served by post office, 1902-17. |
| Sitting Bear Mountain | NW Burke County. Alt. approx. 4,100. |
| Sitton | community in NW Henderson County on South Fork. Served by post office, 1888-1904, named for postmaster Silas Sitton. |