Plum City is a village in Pierce County, Wisconsin, United States. The population was 599 at the 2010 census. Plum City is located at 44°37′59″N 92°11′31″W / 44.63306°N 92.19194°W. According to the United States Census Bureau, the village has a total area of 1.04 square miles, of which 1.02 square miles of it is land and 0.02 square miles is water.