A post office called Argo was established in 1849, and discontinued in 1906. The community most likely was named after the mythological ship Argo.
- U.S. Geological Survey Geographic Names Information System: Argo, Missouri
- "Post Offices". Jim Forte Postal History. Archived from the original on 6 March 2016. Retrieved 24 September 2016.
- "Crawford County Place Names, 1928–1945 (archived)". The State Historical Society of Missouri. Archived from the original on 24 June 2016. Retrieved 24 September 2016.