Mackinac County, Michigan, USA
County or equivalent
Location overview
Mackinac County is in Michigan’s eastern Upper Peninsula, with St. Ignace as its county seat. The county includes Mackinac Island, which lies in Lake Huron in the Straits of Mackinac, east of the Mackinac Bridge. Its predecessor, Michilimackinac County, was set aside in 1818 as one of the early counties of Michigan Territory. It was organized as Mackinac County in 1849.