Arlington Virginia is a world-class community and tourist destination located across the Potomac river from the nation’s capital. It’s the geographically smallest self-governing county in the U.S., occupying slightly less than 26 square miles. Arlington maintains a rich variety of stable neighborhoods and quality schools Home to some of the most influential organizations in the world — including the Pentagon — Arlington stands out as one of America’s preeminent places to live, visit and do business.