Schoolcraft County is a county located in the Upper Peninsula of the U.S. state of Michigan. As of the 2020 census, the population was 8,047, making it Michigan's fourth-least populous county. The county seat is Manistique, which lies along the northern shore of Lake Michigan. The county is named in honor of Henry Schoolcraft, who explored the area with the expedition of Lewis Cass. The county was founded in 1843 and organized in 1876.