Marion County, West Virginia

Marion County, West Virginia
Location within the U.S. state of West Virginia
Coordinates: 39°31′N 80°14′W / 39.51°N 80.24°W / 39.51; -80.24
Country United States
State West Virginia
FoundedJanuary 14, 1842
Named afterFrancis Marion
SeatFairmont
Largest cityFairmont
Area
 • Total
312 sq mi (810 km2)
 • Land309 sq mi (800 km2)
 • Water2.8 sq mi (7.3 km2)  0.9%
Population
 (2020)
 • Total
56,205
 • Estimate 
(2021)
56,001
 • Density182/sq mi (70.2/km2)
Time zoneUTC−5 (Eastern)
 • Summer (DST)UTC−4 (EDT)
Congressional district1st
Websitemarioncountywv.com

Marion County is a county in the U.S. state of West Virginia. As of the 2020 census, the population was 56,205 and its county seat is Fairmont. The county was named in honor of General Francis Marion (ca. 1732–1795), known to history as "The Swamp Fox". Marion County comprises the Fairmont, WV Micropolitan Statistical Area, which is part of the larger Morgantown–Fairmont, WV Combined Statistical Area.