| Cornwell | |
| Settlement Type: | Unincorporated community |
| Pushpin Map: | USA Virginia Northern#USA Virginia#USA |
| Pushpin Label Position: | bottom |
| Pushpin Map Caption: | Location within the state of Virginia |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Virginia |
| Subdivision Type2: | County |
| Subdivision Name2: | Prince William |
| Population As Of: | 2000 |
| Population Density Sq Mi: | auto |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Coordinates: | 38.6889°N -77.4414°W |
| Postal Code Type: | ZIP codes |
| Blank Name: | FIPS code |
| Blank1 Name: | GNIS feature ID |
Cornwell is an unincorporated community in Prince William County, Virginia, United States. It is located on State Route 234 (Dumfries Road) about one mile north of Canova at its intersection with Purcell Road. Though Cornwell is a named location on Mapquest, as of 2006 there is no signage at the location to indicate that the area is identified as such. This place name may no longer be in common local use. Cornwell has also been known as Big Oak.