County Maps US

Monongalia County, West Virginia

A county in West Virginia, ranked 3 of 55 by population.

CountyFIPS 54061

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

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Population
107,991
+2,074 (+2.0%) since 2020
Land area
360.1
square miles. A further 1.6% of the total area is water
Population density
300
people per square mile, computed rather than published
County seat
Morgantown
Seat of county government.
Established
1776
249 years ago
Largest city
Morgantown city
Population 30,293.

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 Monongalia 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 Monongalia 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 800 by 488 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 Monongalia 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
Population107,9913rd of 55584th of 3,144
Land area360.1 sq mi33rd of 552,653rd of 3,144
Population density300 per sq mi6th of 55439th of 3,144
Median household income$65,3467th of 551,611th of 3,143

Full data for Monongalia County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population107,991Vintage 2025 Population Estimates
Population in 2020105,917Vintage 2025 Population Estimates
2020 estimates base?105,821Vintage 2025 Population Estimates
Land area360.1 sq mi2025 Gazetteer Files
Water area5.8 sq mi2025 Gazetteer Files
Total area365.9 sq mi2025 Gazetteer Files
Population density?300 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$65,346American Community Survey 2020-2024 5-Year Estimates
Median home value$267,700American Community Survey 2020-2024 5-Year Estimates
Median age32.7American Community Survey 2020-2024 5-Year Estimates
Households44,629American Community Survey 2020-2024 5-Year Estimates
Housing units49,932American 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
+202
980 births, 778 deaths
Net migration
-151
More people moved out than moved in.

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

The 6 areas bordering Monongalia 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
Marion CountyWest Virginia34 mi55,584
Greene CountyPennsylvania27 mi33,885
Preston CountyWest Virginia22 mi34,004
Wetzel CountyWest Virginia8.5 mi13,734
Fayette CountyPennsylvania8.1 mi123,021
Taylor CountyWest Virginia2.6 mi16,287

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.