Difficult Run, Virginia
| Difficult Run | |
|---|---|
| Coordinates: 38°54′07″N 77°20′49″W / 38.902°N 77.347°W | |
| Country | United States of America | 
| State | Virginia | 
| County | Fairfax | 
| Area | |
| • Land | 8.38 sq mi (21.70 km2) | 
| Population  (2020) | |
|  • Total | 10,600 | 
| • Density | 1,264.9/sq mi (488.5/km2) | 
| Time zone | UTC-5 (Eastern (EST)) | 
| • Summer (DST) | UTC-4 (EDT) | 
Difficult Run is a census designated place in Fairfax County, Virginia, United States. The population was 10,600 at the 2020 census. The CDP has a land area of 8.38 square miles.