St. Louis is a city in Gratiot County in the U.S. state of Michigan. As of the 2010 census the population was 7,482.
A sign in central St. Louis marks the "Middle of the Mitten".
Downtown St. Louis, Michigan
Gratiot County is a county in the U.S. state of Michigan. As of the 2020 Census, the population was 41,761. The county seat is Ithaca, although its most populous city is Alma.
Gratiot County Courthouse