Mossy Head is an unincorporated community in Walton County, Florida, located at the intersection of U.S. Highway 90 and County Road 1087, 2 miles east of the north end of State Road 285. It is at the head of Mossy Head Branch, a tributary of the Shoal River. The ZIP Code for Mossy Head is 32434. In 1951, Mossy Head became the interchange point for a base railroad constructed between the Louisville and Nashville Railroad and Eglin Air Force Base, located partially in Walton County.