Williamson
- County:
- Mingo County
- County Seat:
- Yes
- Area (mi²):
- 3.275
- State:
- West Virginia
Williamson is a city located in Mingo County, West Virginia. Williamson has a 2026 population of 2,779. It is also the county seat of Mingo County. Williamson is currently declining at a rate of -1.77% annually and its population has decreased by -9.36% since the most recent census, which recorded a population of 3,066 in 2020.
The median household income in Williamson is $21,875 with a poverty rate of 49.06%. The median age in Williamson is 42.7 years: 42.6 years for males, and 42.8 years for females. For every 100 females there are 85.0 males.