Suttons Bay Township is a civil township and county seat of Leelanau County in the U.S. state of Michigan. The population was 2,982 at the 2010 census. The village of Suttons Bay is located within the township along Grand Traverse Bay. In a 2004 referendum, voters approved moving the county seat from the community of Leland to a site in section 19 in the southwest corner of the township, nearer to the geographic center of the county. Suttons Bay Township is the only civil township to serve as a county seat in the state of Michigan.