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
Hillcrest (Washington, D.C.) Hillcrest (Washington, D.C.) Hillcrest is a neighborhood in the southeast quadrant of Washington, D.C., United States. Hillcrest is located on the District-Maryland line in Ward 7, east of the Anacostia River. The National Capital Planning Commission defines Hillcrest as bounded by Branch Avenue SE, Gainesville Street SE, 32nd Street SE, and Alabama Avenue SE. It is bordered on the west by Hillcrest Park, which contains the Winston Education Center, Hillcrest Park Public Tennis Center, Hillcrest Recreation Center, and Washington Seniors Wellness Center. Originally, a separate and much more exclusive neighborhood, Summit Park (bounded by Suitland Road SE, Alabama Avenue SE,