| Oak Grove, Loudoun County, Virginia | |
| Settlement Type: | Census-designated place |
| Pushpin Map: | USA Virginia Northern#USA Virginia#USA |
| Pushpin Label: | Oak Grove |
| Pushpin Label Position: | left |
| Subdivision Type: | Country |
| Subdivision Type1: | State |
| Subdivision Type2: | County |
| Subdivision Name2: | Loudoun |
| Unit Pref: | Imperial |
| Area Footnotes: | [1] |
| Area Total Km2: | 3.04 |
| Area Land Km2: | 3.03 |
| Area Water Km2: | 0.01 |
| Population As Of: | 2010 |
| Population Footnotes: | [2] |
| Population Total: | 1777 |
| Population Density Km2: | 586.7 |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Elevation Ft: | 330 |
| Coordinates: | 38.9847°N -77.4186°W |
| Postal Code Type: | ZIP code |
| Postal Code: | 20166 (Sterling) |
| Blank Name: | FIPS code |
| Blank Info: | 51-58104 |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 2584895 |
Oak Grove is a census-designated place in Loudoun County, Virginia, United States. The population as of the 2010 United States Census was 1,777.[2]
Oak Grove is located in eastern Loudoun County, on the Fairfax County border, between the communities of Sterling Park and Herndon. The Washington and Old Dominion Railroad once travelled through the community, now replaced by the Washington & Old Dominion Railroad Trail.