Steinmetz was platted in 1882. and named after W. P. Steinmetz, the original owner of the town site. A post office called Steinmetz was established in 1879, and remained in operation until 1933.
- U.S. Geological Survey Geographic Names Information System: Steinmetz, Missouri
- "Howard County Place Names, 1928–1945 (archived)". The State Historical Society of Missouri. Archived from the original on 24 June 2016. Retrieved 8 October 2016.CS1 maint: BOT: original-url status unknown (link)
- "Post Offices". Jim Forte Postal History. Retrieved 8 October 2016.