| Thoroughfare | a waterway connecting Black River and Cape Fear River, SW Pender County. |
| Thoroughfare Branch | rises in S Lee County and flows NE into Juniper Creek. |
| Thoroughfare Island | a small island in North River, W Currituck County. North of the island, the river is sometimes known as Indian-town Creek. |
| Thoroughfare Swamp | rises in SW Wayne County and flows NE and N into Neuse River. Formerly known as Falling Creek, and so designated on the Price map, 1808, and by Dr. Elisha Mitchell in his 1827 journal. |
| Thorpe Reservoir | See Lake Thorpe. |
| Thrash Branch | rises in central Transylvania County and flows SW into French Broad River. |
| Thrash Creek | rises in NE Cherokee County on Old Mattie Ridge and flows SE and SW into Valley River. See also Wood Lake. |
| Three Forks | See Busick. |
| Three Forks Creek | formed in SE Yancey County by the junction of Left Prong and Right Prong and flows NW into South Toe River. |
| Three Forks Mountain | W central Transylvania County at the NW end of Big Mountain Ridge and the W end of Soapstone Ridge. Alt. 3,774. |