Accokeek is located in the Southern United States, in Southern Maryland, and approximately 17 miles from Washington, D.C.. To the north, Accokeek borders the CDPs of Fort Washington and Clinton; to the east, it borders the CDP of Brandywine; to the south, it borders the CDPs of Bryans Road, Bensville, and Waldorf, all of which are located in Charles County; and to the west, it borders the Potomac River, which flows into the Chesapeake Bay.