Menominee County is a county in the U.S. state of Wisconsin. As of the 2020 census, the population was 4,255, making it the least populous county in Wisconsin. Its county seat is in the community of Keshena.

Keshena is a census-designated place (CDP) in and the county seat of Menominee County, Wisconsin, United States. Located on the Menominee Indian Reservation, it had a population of 1,257 at the 2020 census. Keshena was named for an Indian chief; the Menominee name is Kesīqnaeh which means "Swift Flying".