Interlochen is an unincorporated community and census-designated place (CDP) in Grand Traverse County in the U.S. state of Michigan. At the 2020 census, the population was 694, up from 583 at the 2010 census. The community is located within Green Lake Township, and is home to a post office operating with ZIP Code 49643.

Grand Traverse County is a county located in the U.S. state of Michigan. As of the 2020 census, the population was 95,238, making it the largest county in Northern Michigan. Its county seat is Traverse City. The county is part of the Traverse City metropolitan area, which also includes neighboring Benzie, Kalkaska, and Leelanau counties.