Charles County | |
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![]() Location within the U.S. state of Maryland | |
![]() Maryland's location within the U.S. | |
Coordinates: 38°29′N 77°01′W / 38.48°N 77.01°W | |
Country | ![]() |
State | ![]() |
Founded | April 13, 1658 |
Named for | Charles Calvert, 3rd Baron Baltimore |
Seat | La Plata |
Largest community | Waldorf |
Area | |
• Total | 643 sq mi (1,670 km2) |
• Land | 458 sq mi (1,190 km2) |
• Water | 185 sq mi (480 km2) 29% |
Population (2020) | |
• Total | 166,617 ![]() |
• Density | 363.8/sq mi (140.5/km2) |
Time zone | UTC−5 (Eastern) |
• Summer (DST) | UTC−4 (EDT) |
Congressional district | 5th |
Website | www |
Charles County is a county located in the U.S. state of Maryland. As of the 2020 census, the population was 166,617.[1] The county seat is La Plata.[2] The county was named for Charles Calvert (1637–1715), third Baron Baltimore. Charles County is part of the Washington metropolitan area and the Southern Maryland region.[3]
With a median household income of $103,678,[4] Charles County is the 39th-wealthiest county in the United States as of 2020, and the highest-income county in the United States with a Black-majority population.[5]