| Official Name: | Big Vein, Virginia |
| Pushpin Map: | Virginia#USA |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Virginia |
| Subdivision Type2: | County |
| Subdivision Name2: | Tazewell |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Elevation Ft: | 2398 |
| Coordinates: | 37.2961°N -81.3567°W |
| Area Code: | 276 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 1492576 |
Big Vein is an unincorporated community in Tazewell County, Virginia, United States.