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 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. The population of the CDP was 2,080 at the 2000 census.Devils Lake is at the northern end of Devils Lake on US 223 at 42°00′28″N 84°17′33″W / 42.00778°N 84.29250°W / 42.00778; -84.29250. Manitou Beach is at the southwest end of Devils Lake at 41°58′11″N 84°18′30″W / 41.96972°N 84.30833°W / 41.96972; -84.30833, approximately 2.5 mi southwest of Devils Lake and about 2 mi east-southeast of Addison.