Charles County is a county located in the U.S. state of Maryland. As of the 2020 census, the population was 166,617. The county seat is La Plata. 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.
Thomas Stone House
La Plata is a town in Charles County, Maryland, United States. The population was 10,159 at the 2020 census. It is the county seat of Charles County.
Charles County Courthouse
US 301 southbound just south of MD 6 in La Plata