| Old Ford Swamp | rises in NW Beaufort County and flows W to join Snoad Branch in forming Aggie Run. |
| Old Fort | town in W McDowell County on Catawba River. Alt. 1,438. Inc. 1872 as Catawba Vale by a northern land company that expected to develop a city on the Davidson plantation, which it had purchased the previous year. Name changed in 1873 to Old Fort, the name by which the community had been known since 1828 or earlier, when a post office existed there. Named for Davidson's Fort, erected in 1776 by troops under the command of Gen. Griffith Rutherford, who led expedition against the Cherokee Indians. |
| Old Fort Township | SW McDowell County. |
| Old Furnace | community in S Gaston County served by post office, 1848-1902. |
| Old Gilreath | community in S Wilkes County 3 mi. NW of Gilreath. |
| Old House Branch | rises in SE Watauga County and flows NE into Dugger Creek. |
| Old House Channel | a slough in the waters of Pamlico Sound immediately W of and leading to Oregon Inlet, E Dare County. Also known as Old House Slough. |
| Old House Creek | a short stream in N central Carteret County flowing N into South River. |
| Old Hundred | community in W Scotland County. Named because the 100-mile post was there when the railroad from Wilmington was built. Alt. 318. |
| Old Lanesboro | See Lanesboro. |