St. Germain is a town in Vilas County, Wisconsin, United States. The population was 1,932 at the 2000 census. The unincorporated community of St. Germain is located in the town. According to the United States Census Bureau, the town has a total area of 40.0 square miles, of which, 34.0 square miles of it is land and 6.0 square miles of it is water.