Woodruff is a town in Oneida County, Wisconsin, United States. The population was 2,055 at the 2010 census. The census-designated place of Woodruff is located in the town. According to the United States Census Bureau, the town has a total area of 35.6 square miles, of which, 28.5 square miles of it is land and 7.0 square miles of it is water.