Welcome to Arlington National Cemetery! ■▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬■ "Our Most Sacred Shrine" ■▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬■ Arlington National Cemetery is a United States military cemetery in Arlington County, Virginia, across the Potomac River from Washington, D.C., in whose 624 acres (253 ha) the dead of the nation's conflicts have been buried, beginning with the Civil War. The United States Department of the Army, a component of the United States Department of Defense, controls the cemetery.