Mackinac Island is a city in Mackinac County in the U.S. state of Michigan. In the 2010 census, the city had a permanent population of 492, although there are thousands more seasonal workers and tourists during the summer months. From 1818–1882, the city was the county seat of the former Michilimackinac County, which was later organized into Mackinac County with St. Ignace as the county seat. The city includes all of Mackinac Island and the unpopulated Round Island, which is federally owned and part of Hiawatha National Forest. The city also includes all of Mackinac Island State Park, which includes 80% of Mackinac Island and is governed by the Mackinac Island State Park Commission. The city is served by the Mackinac Island Public School.