| Flattop | See Flat Springs Knob. |
| Flattop Branch | rises in S Watauga County at the SW end of Flattop Mountain and flows SE into Middle Fork [South Fork New River]. |
| Flattop Cliffs | See Flattop Mountain. |
| Flattop Creek | rises in E central Avery County and flows N into Banner Elk Creek. |
| Flattop Mountain | E Avery County. Alt. approx. 5,050. Known also as Flattop Cliffs. |
| Flattop Mountain | S Watauga County NW of Blowing Rock. Alt. 4,568. |
| Flattop Mountain | N Yancey County, extends NE from the head of Deer Creek to Nolichucky River. |
| Flattop Mountain | See Flat Mountain. |
| Flattop Mountain Branch | rises in NW Yancey County and flows W into Tennessee, where it enters Spivey Creek. |
| Flatty Creek | See Big Flatty Creek. |