| Official Name: | Southside, West Virginia |
| Pushpin Map: | West Virginia#USA |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | West Virginia |
| Subdivision Type2: | County |
| Subdivision Name2: | Mason |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Elevation Ft: | 564 |
| Coordinates: | 38.7167°N -81.9686°W |
| Postal Code Type: | ZIP code |
| Postal Code: | 25187[1] |
| Area Code: | 304 & 681 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 1547094[2] |
Southside is an unincorporated community in Mason County, West Virginia, United States. Southside is located near the Kanawha River south of Leon. It is currently served by U.S. Route 35, but will be bypassed once the planned upgrading of that route into a four-lane highway is complete.[3]
Located near Southside are the Couch-Artrip House and Elm Grove, both of which are listed on the National Register of Historic Places.