| Mountain Falls, Virginia | |
| Settlement Type: | Unincorporated community |
| Pushpin Map: | Virginia#USA |
| Pushpin Label: | Mountain Falls |
| Pushpin Label Position: | bottom |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Virginia |
| Subdivision Type2: | County |
| Subdivision Name2: | Frederick |
| Unit Pref: | Imperial |
| Population As Of: | 2000 |
| Population Density Km2: | auto |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Coordinates: | 39.1172°N -78.3956°W |
| Postal Code Type: | ZIP codes |
| Blank Name: | FIPS code |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 1485677 |
Mountain Falls is an unincorporated community in Frederick County, Virginia, United States. Mountain Falls is situated near the confluence of Richards Run and Fall Run, from which it takes its name. Mountain Falls is also the location of the crossroads of Wardensville Grade, Back Mountain Road, and Mountain Falls Road.