Explanation
The Pentagon is located in Arlington, Virginia, just across the Potomac River from Washington, D.C. Arlington County is part of the Commonwealth of Virginia, not the District of Columbia or any other state.
Practice this MCQ: Which is the headquarters of the US Department of Defence, Pentagon is located in Arlington. In which state Arlington is situated?. ...
The Pentagon is located in Arlington, Virginia, just across the Potomac River from Washington, D.C. Arlington County is part of the Commonwealth of Virginia, not the District of Columbia or any other state.