Kearsarge is an unincorporated community in Calumet Township, Houghton County in the U.S. state of Michigan. It is approximately 2 miles (3.2 km) northeast of Calumet/Laurium on U.S. Route 41/M-26 at 47°16′30″N 88°24′58″W / 47.27500°N 88.41611°W. Kearsarge is served by a post office with ZIP code 49942, providing P.O. Box service.