Garnet, Wisconsin is an unincorporated community in Fond du Lac County, in the U.S. state of Wisconsin. The community is on the north boundary of the county, just south of Calumet County. It is located at the intersection of County Highway HHH and Town Hall Road just east of Calumet County C, in the town of Calumet. Garnet is located 1.95 miles (3.14 km) east of Calumetville.