| Oakville | community in N Warren County between Hawtree Creek and Sixpound Creek. A post office est. there in 1872 was discontinued in 1907. |
| Oakwood Acres | community in S Davidson County on High Rock Lake. |
| Oakwoods | community in S Wilkes County between Cub Creek and East Prong Cub Creek. Settled by several Scottish families. |
| Oaky Mountain | NE Chatham County. |
| Obadiah Cove | W Graham County between Fork Ridge and Hooper Mill Creek. |
| Obadiah Gap | on Horse Cove Ridge in W Graham County. |
| Oberlin | formerly a community in central Wake County NW of Raleigh but now a part of the city of Raleigh. |
| Obids | community in S Ashe County. Alt. approx. 2,800. |
| Obids Creek | rises in SE Ashe county and flows N into South Fork New River. |
| Obids Township | SE Ashe County. |