Frederick County, Maryland Frederick County, Maryland Frederick County is located in the northern part of the U.S. state of Maryland. As of the 2010 U.S. Census, the population was 240,336. The county seat is Frederick. Frederick County is included in the Washington-Arlington-Alexandria, DC-VA-MD-WV Metropolitan Statistical Area. Like other outlying sections of the Washington metropolitan area, Frederick County has experienced a rapid population increase in recent years. It borders the southern border of Pennsylvania and the northeastern border of Virginia. The county is home to Catoctin Mountain Park (encompassing the presidential retreat Camp David) and to the U.S. Army's Fort Detrick. It has also
Washington Monument State Park facilities are also available. Washington Monument State Park Washington Monument State Park is a public recreation area located approximately east of Boonsboro, Maryland. The park preserves the Washington Monument, a tower honoring George Washington, the first President of the United States. The monument, which sits near the summit of South Mountain's Monument Knob, was added to the National Register of Historic Places in 1972. The park is managed by the Maryland Department of Natural Resources. Built in 1827, the original tower was the first monument dedicated to George Washington to be completed. The Washington Monument in Baltimore was completed two