| population | |
| Clarksville | 231 |
| population | |
| Clarksville Post Office |
 | Greene County Airport | ~ 11.01 km |
| Washington County Airport | ~ 27.65 km |
| Morgantown Municipal Airport Walter L. (Bill) Hart Field | ~ 38.36 km |
| Allegheny County Airport | ~ 43.34 km |
| Wheeling Ohio County Airport | ~ 55.90 km |
| Pittsburgh International Airport | ~ 59.70 km |
| Glendale Fokker Field | ~ 61.06 km |
| Arnold Palmer Regional Airport | ~ 63.85 km |
| North Central West Virginia Airport | ~ 77.00 km |
