Mackinaw City is a village at the northernmost point of the Lower Peninsula of Michigan, United States. Divided between Cheboygan and Emmet counties, Mackinaw City is located at the southern end of the Mackinac Bridge, which carries Interstate 75 over the Straits of Mackinac to St. Ignace, in the Upper Peninsula. Mackinaw City and St. Ignace also serve as access points for ferries to and from Mackinac Island.