Long Lake is a town in Florence County, Wisconsin, United States. The population was 197 at the 2000 census. The census-designated place of Long Lake is located in the town.

According to the United States Census Bureau, the town has a total area of 35.8 square miles (92.8 km²), of which, 34.0 square miles (88.0 km²) of it is land and 1.9 square miles (4.8 km²) of it (5.16%) is water.