Winfield Township is one of nine townships in DuPage County, Illinois, USA. As of the 2010 census, its population was 46,233 and it contained 15,856 housing units. It is the least populous of the DuPage County Townships.GeographyAccording to the 2010 census, the township has a total area of, of which is land and is water.Cities, towns, villages Aurora (northeast edge) Batavia (partial) Naperville (partial) Warrenville (northwest three-quarters) West Chicago (partial) Wheaton (partial) Winfield (partial)Unincorporated towns Geneva Road at Warrenhurst at (This list is based on USGS data and may include former settlements.)CemeteriesThe township contains these seven cemeteries: Assumption, Big Woods, Calvary, Glen Oak, Oakwood, Pioneer and Warrenville.Major highways 25px Illinois Route 38 25px Illinois Route 56 25px Illinois Route 59