Where Is Arlington? Arlington County, Virginia

Arlington is an urban county in the Commonwealth of Virginia, directly across the Potomac River from Washington, D.C.

• Status: County (no incorporated cities/towns); smallest self-governing county in USA (26 sq mi / 67 km²).
• Location: Northern Virginia; bordered by Fairfax County (south/west), City of Falls Church (west), Alexandria (south), Potomac River (north/east).
• Key Landmarks: Pentagon, Arlington National Cemetery, Reagan National Airport, Arlington Memorial Bridge, Iwo Jima Memorial, Crystal City, Rosslyn, Ballston, Clarendon.
• Transit: 11 Metro stations (Orange, Silver, Blue, Yellow lines); major bus network.
• Population: ~240,000 (2023); dense, diverse, highly educated.

Though often perceived as a city, Arlington is a county functioning as a principal inner suburb of the nation's capital.