| Flat Springs Creek | rises in Tennessee and flows E into N Avery County, where it enters Beech Creek. |
| Flat Springs Gap | on the Buncombe-Yancey county line between Flat Springs Knob and Big Butt. |
| Flat Springs Knob | on the Buncombe-Yancey county line NE of Flat Springs Gap at lat. 35°47'30" N., long. 82°20'30" W. Alt. 5,700-5,800. Sometimes also known as Flattop. |
| Flat Swamp | rises in S Hertford County and flows SE to join Horse Swamp in forming Bear Swamp. |
| Flat Swamp | rises in N Jones County and flows S into Rattlesnake Branch. |
| Flat Swamp | rises in W Martin County and flows SE into Tranters Creek. |
| Flat Swamp | rises in SW Onslow County and flows NW into Pender County, where it enters Shaking Creek. |
| Flat Swamp Creek | rises in E central Bertie County and flows SW into Hoggard Mill Creek. Flat Swamp is mentioned in local records as early as 1724. |
| Flat Swamp Creek | rises in E Davidson County and flows SW into Yadkin River. |
| Flat Swamp Creek | See Flat Creek. |