Mount Nebo is an unincorporated community in Nicholas County, West Virginia, United States. Mount Nebo is located at the junction of state routes 41 and 129, 5.5 miles south of Summersville. Mount Nebo has a post office with ZIP code 26679.Mount Nebo is the home of the Summersville Lake Lighthouse, which was established on June 20, 2013. It is the only working lighthouse in the state of West Virginia. It is listed in the FAA Charts, therefore designating it as an aeronautical navigational aid.