The City of Alexandria is located in northern Virginia and is bordered by the District of Columbia (Potomac River), Arlington and Fairfax counties. With a population of approximately 150,000 and a land area of 15.75 square miles, Alexandria is the seventh largest city in the Commonwealth of Virginia. Alexandria has a charming waterfront and is a unique and historic place to live and work. About on...e-quarter square miles in the city have been designated as a national or local historic district. We proudly embrace our rich history and seize the endless opportunities that lie ahead.