Glen Arbor is an unincorporated community and census-designated place in Glen Arbor Township, Leelanau County, Michigan, United States. A small tourist town, Glen Arbor lies on an isthmus between Lake Michigan and Glen Lake. It is adjacent to Sleeping Bear Dunes National Lakeshore. Its population was 261 as of the 2020 census, up from 229 at the 2010 census. The community is located along M-22 and the Lake Michigan shore. Glen Arbor has a post office with ZIP code 49636.