Calvert County is a county located in the U.S. state of Maryland. As of the 2020 census, the population was 92,783. Its county seat is Prince Frederick. The county's name is derived from the family name of the Barons of Baltimore, the proprietors of the English Colony of Maryland. Calvert County is included in the Washington–Arlington–Alexandria, DC–VA–MD–WV Metropolitan Statistical Area. It occupies the Calvert Peninsula, which is bordered on the east by Chesapeake Bay and on the west by the Patuxent River. Calvert County is part of the Southern Maryland region. The county has one of the highest median household incomes in the United States. It is one of the older counties in Maryland, after St. Mary's, Kent County and Anne Arundel counties.

Founded: 1654
Named for: Calvert family
Seat: Prince Frederick
Largest town: Chesapeake Beach
Total: 345 sq mi (893.55 km²)
Land: 213 sq mi (551.67 km²)
Water: 132 sq mi (341.88 km²), 38
Density: 435.60/sq mi (/km²)
Time zone: Eastern: UTC-5-4
Official Website: http://www.co.cal.md.us/
Wikidata description: county in Maryland, United States
Wikidata id: Q501277
Wikidata label: Calvert County
Wikidata aliases: Array
Source
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