Hampden is an unincorporated community in Mingo County, West Virginia, United States. Hampden is located on U.S. Route 52 and Horsepen …Hampden is an unincorporated community in Mingo County, West Virginia, United States. Hampden is located on U.S. Route 52 and Horsepen Creek, 4.8 miles west-northwest of Gilbert. Hampden had a post office, which closed on November 2, 2002.