Mercer County at a glance
Mercer County is one of 55 county-level areas in West Virginia. Its 419 square miles of land place it at position 27 among those areas by land size. Including 1.7 square miles of water, its mapped total area is approximately 420.7 square miles.
| Full Census name | Mercer County |
|---|---|
| State | West Virginia |
| FIPS / GEOID | 54055 |
| Boundary vintage | 2025 |
| Outline source scale | 1:500,000 |
Counties along the boundary
These county-level areas share a line segment with Mercer County in the Census cartographic boundary dataset. Select one to continue exploring.
- Bland CountyVirginia
- Giles CountyVirginia
- Tazewell CountyVirginia
- McDowell CountyWest Virginia
- Raleigh CountyWest Virginia
- Summers CountyWest Virginia
- Wyoming CountyWest Virginia
Looking for another Mercer County?
The short name “Mercer” also appears elsewhere. The state and FIPS code distinguish this area.
- Mercer County, Illinois
- Mercer County, Kentucky
- Mercer County, Missouri
- Mercer County, New Jersey
- Mercer County, North Dakota
- Mercer County, Ohio
- Mercer County, Pennsylvania
Using this map
Choose a blank outline for coloring or a labelled download for reference. SVG preserves editable boundary artwork, PNG works in slides, and PDF provides a ready-to-print landscape page. Use the full state map to compare surrounding counties.
Roads, topography, and aerial imagery are available in the interactive background viewer. Those backgrounds have their own dates and sources; the red boundary overlay follows the 2025 Census geography.
Sources and precision
U.S. Census Bureau, 2025 Cartographic Boundary Files. The county outline uses the 1:500,000 file; location maps and interactive overlays use 1:5,000,000. Areas come from ALAND and AWATER, converted to square miles and rounded to one decimal place. Neighbor links are calculated from shared boundary segments, not from point-only contacts. Generalized maps are for geographic reference, not parcel or legal boundary determination. Full methodology.