County Maps US

Berkeley County, West Virginia

A county in West Virginia, ranked 2 of 55 by population.

CountyFIPS 54003

Within West Virginia
Berkeley County, highlighted, with the areas around it. Boundaries generalised from the 2025 Census cartographic boundary file; neighbour fills carry no data. The dot marks Martinsburg, the county seat, located via the 2025 Census Gazetteer.

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Population
139,522
+16,829 (+13.7%) since 2020
Land area
321.1
square miles. A further 0.1% of the total area is water
Population density
434
people per square mile, computed rather than published
County seat
Martinsburg
Seat of county government.
Established
1772
253 years ago
Largest city
Martinsburg city
Population 19,211.

Sources: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026; US Census Bureau, Gazetteer Files, 2025 Gazetteer Files, released 10 September 2025; Wikidata (CC0), Wikidata. Retrieved 30 August 2026.

Satellite view

Aerial imagery of Berkeley County with its boundary drawn on top. A map shows you the shape; this shows you what is inside it, and which side of the line a place falls on.

Aerial view of Berkeley County, West Virginia from the USGS National Map, with its boundary outlined
Imagery: USGS National Map, USGS Imagery Only, public domain, requested from USGS by your browser when you reach this point on the page, at 713 by 800 pixels. The boundary is the 2025 Census cartographic boundary file, reprojected to Web Mercator to match the imagery. You can also open the USGS National Map viewer.

Where Berkeley County ranks

Position among the 55 counties of West Virginia, and among all 3,144 US counties and county-equivalents. Computed from the figures on this page.

MeasureValueIn West VirginiaNationally
Population139,5222nd of 55483rd of 3,144
Land area321.1 sq mi41st of 552,758th of 3,144
Population density434 per sq mi1st of 55323rd of 3,144
Median household income$80,8152nd of 55546th of 3,143

Full data for Berkeley County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population139,522Vintage 2025 Population Estimates
Population in 2020122,693Vintage 2025 Population Estimates
2020 estimates base?122,073Vintage 2025 Population Estimates
Land area321.1 sq mi2025 Gazetteer Files
Water area0.41 sq mi2025 Gazetteer Files
Total area321.5 sq mi2025 Gazetteer Files
Population density?434 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$80,815American Community Survey 2020-2024 5-Year Estimates
Median home value$266,300American Community Survey 2020-2024 5-Year Estimates
Median age38.5American Community Survey 2020-2024 5-Year Estimates
Households51,021American Community Survey 2020-2024 5-Year Estimates
Housing units53,819American Community Survey 2020-2024 5-Year Estimates

Sources: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026; US Census Bureau, Gazetteer Files, 2025 Gazetteer Files, released 10 September 2025; US Census Bureau, American Community Survey, American Community Survey 2020-2024 5-Year Estimates, released 29 January 2026. Population density is computed here, not published: it divides the Vintage 2025 population estimate by the 2025 Gazetteer land area, which are two different Census products. Retrieved 30 August 2026.

How the population changed

The Census Bureau publishes the components behind an estimate, not just the total. For the year to July 2025:

Births minus deaths
+389
1,632 births, 1,243 deaths
Net migration
+3,170
More people moved in than moved out.

Source: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026. Retrieved 30 August 2026.

The 5 areas bordering Berkeley County

Ordered by the length of the border actually shared, which the Census Bureau publishes in its county adjacency file and which no other county reference presents.

Bordering areaStateShared borderPopulation
Washington CountyMaryland34 mi157,731
Jefferson CountyWest Virginia26 mi63,102
Morgan CountyWest Virginia24 mi18,027
Frederick CountyVirginia14 mi99,955
Clarke CountyVirginiaa single point15,609

Source: US Census Bureau, County Adjacency File, 2025 County Adjacency File, released 15 September 2025. Retrieved 30 August 2026.

All 55 counties of West Virginia

Open the interactive West Virginia county map, or jump straight to any of them.

Data on this page last rebuilt 30 August 2026. How these figures are produced.