Grantsville
- County:
- Calhoun County
- County Seat:
- Yes
- Area (mi²):
- 0.435
- State:
- West Virginia
Grantsville is a town located in Calhoun County, West Virginia. Grantsville has a 2026 population of 463. It is also the county seat of Calhoun County. Grantsville is currently declining at a rate of -1.07% annually and its population has decreased by -5.51% since the most recent census, which recorded a population of 490 in 2020.
The median household income in Grantsville is $28,438 with a poverty rate of 48.53%. The median age in Grantsville is 39.8 years: 36.5 years for males, and 46 years for females. For every 100 females there are 98.5 males.