Manitou Beach and Devils Lake are two unincorporated communities in the Irish Hills region of Lenawee County in the U.S. state of Michigan. In order to provide statistical information, the United States Census Bureau has defined Manitou Beach-Devils Lake as a census-designated place (CDP) that includes both communities. The statistical information pertains to the entire CDP, although local understanding of the area making up these communities may vary somewhat from the definition of the CDP.