Winfield is an incorporated village located in Milton and Winfield Townships, DuPage County, Illinois, United States. The population was 8,718 at the 2000 census, and increased to 9,080 in the 2010 census.
Winfield is home to Central DuPage Hospital, one of the largest hospitals in the Chicago suburbs. Winfield has a Metra station on the Union Pacific/West Line, which provides regular commuter rail service to Chicago. Attractions adjacent to Winfield include the Forest Preserve District of DuPage County's Kline Creek Farm, a living history farm located on the west side of County Farm Road between Geneva and St. Charles Roads; and Cantigny, which includes public gardens, museums, golf courses, picnic grounds and hiking trails. Cantigny is located on the east side of Winfield Road, just south of Illinois Route 38, also known as Roosevelt Road. Winfield also enjoys parks and recreational services provided by the Winfield Park District. The Forest Preserve District of DuPage County also owns and operates several other open space areas surrounding Winfield.