Lemonweir is a town in Juneau County, Wisconsin, United States. The population was 1,763 at the 2000 census. The unincorporated community of Lemonweir is located in the town. According to the United States Census Bureau, the town has a total area of 42.7 square miles, of which, 42.6 square miles of it is land and 0.1 square miles of it is water.