Competition was originally called "Newburg", and under the latter name settlement was made in the 1840s. A post office called Competition was established in 1858, and remained in operation until 1967. A naming competition accounts for the present name.
- U.S. Geological Survey Geographic Names Information System: Competition, Missouri
- "Laclede County Place Names, 1928–1945 (archived)". The State Historical Society of Missouri. Archived from the original on 24 June 2016. Retrieved 24 October 2016.
- "Post Offices". Jim Forte Postal History. Archived from the original on 24 October 2016. Retrieved 24 October 2016.