| Waterloo, Virginia | |
| Settlement Type: | Unincorporated community |
| Pushpin Map: | USA Virginia Northern#USA Virginia#USA |
| Pushpin Label: | Waterloo |
| Pushpin Label Position: | bottom |
| Pushpin Map Caption: | Location within the Commonwealth of Virginia |
| Subdivision Type: | Country |
| Subdivision Type1: | State |
| Subdivision Type2: | County |
| Subdivision Name2: | Clarke |
| 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: | 39.0828°N -78.0831°W |
| Postal Code Type: | ZIP codes |
| Blank Name: | FIPS code |
| Blank1 Name: | GNIS feature ID |
Waterloo is an unincorporated community in Clarke County in the U.S. state of Virginia. Waterloo is located at the crossroads of John Mosby Highway (U.S. Route 17/U.S. Route 50) and Lord Fairfax Highway (U.S. Route 340).