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
Hanover, Maryland is served by the Anne Arundel County Public Schools and Howard County Public Schools system. Hanover, Maryland Hanover is an unincorporated community in the Baltimore/Annapolis area in northwestern Anne Arundel County and eastern Howard County in the U.S. state of Maryland, located south of Baltimore. It is located approximately at the intersection of Maryland State Highway 100 and the Baltimore-Washington Parkway. It is part of the Baltimore-Washington Metropolitan Area and is located just southwest of the Baltimore-Washington International Thurgood Marshall Airport (commonly known as "BWI"). It is bordered by Severn to the south, Linthicum to the east, Baltimore to the