Mercer County on the map of West Virginia as of 2025. Cities, roads, borders and directions in Mercer County of West Virginia.

Mercer County is found in the southern areas of West Virginia. This honorable county is named after Hugh Mercer (1726-77), American Revolutionary War General (1775-76). The population of Mercer County exceeds 59 thousand people. The county, formed in 1837, covers an area of 420 square miles. The county seat of Mercer County is Princeton. This map shows the borders of Mercer County as well as neighboring counties, including major highways and natural objecsts as of 2025. Zoom in or out of the map using the plus/minus panel. Move the center of this map by dragging it. Also check out the satellite map of Mercer County.