Mahnomen County, Minnesota: History
The county was created from the east half of Norman County on December 27, 1906, with Mahnomen, a former railway station town, as the county seat. The county was named for the town, the name of which is one spelling of the Ojibwe word for "wild rice".
From 1857 to 1858, similarly named Manomin County existed in Minnesota, which merged into Anoka County.