Interlochen is an unincorporated community and census-designated place 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. The community is home to the Interlochen Center for the Arts and also contains Interlochen State Park between the shores of Duck Lake and Green Lake.