Arlington is an urban county of about 26 square miles located directly across the Potomac River from Washington DC . No incorporated towns or cities lie within Arlington 's boundaries.
Although perhaps best known to visitors as the home of the Pentagon and Arlington National Cemetery, Arlington boasts high quality residential neighborhoods. Residents are actively involved in the community. Arlington has over 50 civic associations, dozens of citizen boards and commissions, and over 100 community service organizations. There are almost 200 public parks and playgrounds, 86 miles of biking/jogging trails, 14 community centers, 5 theaters and 8 libraries in Arlington for residents and visitors to enjoy.