Frederick County
US county in Maryland
Frederick County is located in Maryland, United States. As of the 2020 U.S. census, the population was 271,717. The county seat is Frederick.
Frederick County is part of the Washington-Arlington-Alexandria, DC-VA-MD-WV Metropolitan Statistical... Wikipedia
Population: 287,079 (2022)
Sales tax rate: 6%
Area codes: 301, 240
Congressional districts: 6th
County seat: Frederick
Founded: June 10, 1748