Mercer County
Also known as Mercer County, West Virginia, Mercer County, Virginia, Mercer County, WV
county in West Virginia, United States
Key facts
- Country
- United States
- State
- West Virginia
- Founded
- March 17, 1837
- Seat
- Princeton
- Largest town
- Bluefield
- Total
- 421 sq mi (1,090 km )
- Land
- 419 sq mi (1,090 km )
- Water
- 1.7 sq mi (4.4 km ) 0.4%
- Estimate 2025
- 57,503
- Density
- 142/sq mi (55.0/km )
- Time zone
- UTC−5 ( Eastern )
- Summer dst
- UTC−4 ( EDT )
- Congressional district
~10 min read
Article
Mercer County is a county in Southern West Virginia on the southeastern border of the U.S. state of West Virginia. At the 2020 census, the population was 59,664. Its county seat is Princeton. The county was originally established in the State of Virginia by act of its General Assembly on March 17, 1837, using lands taken from Giles and Tazewell counties.
Mercer County is part of the Bluefield, WV-VA Micropolitan Statistical Area.