Emmett was platted in 1881 when the railroad was extended to that point. A post office called Emmett was established in 1882, and remained in operation until 1904. The community was named after William Emmett Boyd, the son of the original owner of the town site.
- U.S. Geological Survey Geographic Names Information System: Emmett (historical)
- "Dade County Place Names, 1928–1945 (archived)". The State Historical Society of Missouri. Retrieved 25 September 2016.
- "Post Offices". Jim Forte Postal History. Retrieved 25 September 2016.