| Flat Branch | rises in NE Cherokee County and flows S into Valley River. |
| Flat Branch | rises in NW Gates County and flows SE through Jones Swamp into Hacklan Branch. |
| Flat Branch | rises in N Haywood County and flows NW into Laurel Creek. |
| Flat Branch | rises in S Mecklenburg County and flows SE into Sixmile Creek. |
| Flat Branch | rises in W Mitchell County and flows SW into Nolichucky River. |
| Flat Branch | rises in W Surry County and flows E into Fisher River. |
| Flat Branch | rises in W Swain County and flows NW into Tuckasegee River. |
| Flat Branch | rises in S Watauga County and flows SE into Buffalo Branch. |
| Flat Branch | rises in SE Watauga County and flows NE into Laurel Fork. |
| Flat Branch | community in E Gates County. |