Winfield Township is one of nine townships in DuPage County, Illinois, United States. As of the 2020 census, its population was 45,836 and it contained 16,445 housing units. It is the least populous township in DuPage County.
According to the 2021 census gazetteer files, Winfield Township has a total area of , of which (96.23%) is land and (3.77%) is water.
(This list is based on USGS data and may include former settlements.)
The township contains these seven cemeteries: Assumption, Big Woods, Calvary, Glen Oak, Oakwood, Pioneer, and Warrenville.
As of the 2020 census, there were 45,836 people, 15,540 households, and 10,979 families residing in the township. The population density was . There were 16,445 housing units at an average density of . The racial makeup of the township was 57.26% White, 2.62% African American, 1.60% Native American, 3.79% Asian, 0.02% Pacific Islander, 19.94% from other races, and 14.76% from two or more races. Hispanic or Latino of any race were 38.18% of the population.