Mindenmines is a city in Barton County, Missouri, United States. The population was 271 at the 2020 census. The city lies approximately four miles east of Frontenac, Kansas. It has possessed a post office since 1883. It is also the home of the Bank of Minden. (named Tusconia 1883–1884, Minden Mines 1884–1895, and Mindenmines since 1895).