Leelanau County is a county located in the U.S. state of Michigan. As of the 2020 census, the population was 22,301. Since 2008, the county seat has been located within Suttons Bay Township, one mile east of the unincorporated village of Lake Leelanau. Before 2008, Leelanau County's seat was Leland. Leelanau County is included in the Traverse City metropolitan area of Northern Michigan. The largest settlement in Leelanau County by population is Greilickville, itself a suburb of Traverse City.