Fort Washington is an unincorporated area and census-designated place in Prince George's County, Maryland, United States. It borders the Potomac River, situated 20 miles south of downtown Washington, D.C. As of the 2020 census, it had a population of 24,261. Some iconic places: Gaylord National Resort & Convention Center, MGM National Harbor Hotel & Casino, National Children's Museum, Huntley Meadows Park, Fort Washington Park, The Capital Wheel