Annapolis is the capital of the U.S. state of Maryland, as well as the county seat of Anne Arundel County. It had a population of 38,394 at the 2010 census and is situated on the Chesapeake Bay at the mouth of the Severn River, 26 miles south of Baltimore and about 29 miles east of Washington, D.C. Annapolis is part of the Baltimore-Washington Metropolitan Area.