A post office called Nebo was established in 1868, and remained in operation until 1960. The community most likely derives its name from Mount Nebo, a place mentioned in the Hebrew Bible.
- U.S. Geological Survey Geographic Names Information System: Nebo, Missouri
- "Post Offices". Jim Forte Postal History. Retrieved 24 October 2016.
- "Laclede County Place Names, 1928–1945 (archived)". The State Historical Society of Missouri. Retrieved 24 October 2016.