Lisle Township is one of nine townships in DuPage County, Illinois, USA. As of the 2020 census, its population was 119,040 and it contained 48,875 housing units. According to the 2021 census gazetteer files, Lisle Township has a total area of 35.99 square miles, of which 35.37 square miles is land and 0.61 square miles is water.