| Official Name: | Duo, West Virginia |
| Pushpin Map: | West Virginia#USA |
| Pushpin Label: | Duo |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | West Virginia |
| Subdivision Type2: | County |
| Subdivision Name2: | Greenbrier |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Elevation Ft: | 3373 |
| Coordinates: | 38.0711°N -80.5975°W |
| Area Code: | 304 & 681 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 1554339[1] |
Duo is an unincorporated community and coal town in Greenbrier County, West Virginia, United States. Duo is 6miles east-northeast of Quinwood.
The community was so named on account of there being only two houses standing at the town site.[2]