County Maps US

Calvert County, Maryland

A county in Maryland, ranked 15 of 24 by population.

CountyFIPS 24009

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

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Population
94,484
+1,562 (+1.7%) since 2020
Land area
213.2
square miles. A further 38.2% of the total area is water
Population density
443
people per square mile, computed rather than published
County seat
Prince Frederick
Seat of county government.
Established
1654
371 years ago
Largest city
Chesapeake Beach town
Population 6,466.

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 Calvert 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 Calvert County, Maryland 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 481 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 Calvert County ranks

Position among the 24 counties of Maryland, and among all 3,144 US counties and county-equivalents. Computed from the figures on this page.

MeasureValueIn MarylandNationally
Population94,48415th of 24651st of 3,144
Land area213.2 sq mi23rd of 242,979th of 3,144
Population density443 per sq mi9th of 24320th of 3,144
Median household income$133,9222nd of 2422nd of 3,143

Full data for Calvert County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population94,484Vintage 2025 Population Estimates
Population in 202092,922Vintage 2025 Population Estimates
2020 estimates base?92,791Vintage 2025 Population Estimates
Land area213.2 sq mi2025 Gazetteer Files
Water area131.9 sq mi2025 Gazetteer Files
Total area345.1 sq mi2025 Gazetteer Files
Population density?443 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$133,922American Community Survey 2020-2024 5-Year Estimates
Median home value$460,200American Community Survey 2020-2024 5-Year Estimates
Median age40.8American Community Survey 2020-2024 5-Year Estimates
Households33,465American Community Survey 2020-2024 5-Year Estimates
Housing units36,119American 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
-31
874 births, 905 deaths
Net migration
-106
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 Calvert 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
St. Mary's CountyMaryland28 mi116,692
Dorchester CountyMaryland19 mi33,628
Prince George's CountyMaryland18 mi970,374
Anne Arundel CountyMaryland17 mi603,380
Talbot CountyMaryland9.5 mi38,238
Charles CountyMaryland2.9 mi176,593

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

All 24 counties of Maryland

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

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