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is an incorporated village in DuPage County, Illinois, United States. The population was 8,718 at the 2000 census, and estimated to be 9,844 in 2005.
Winfield is home to Central DuPage Hospital, one of the largest hospitals in the Chicago suburbs. Winfield has a station on the Union Pacific train line which provides regular commuter rail service to Chicago.
The Village of Winfield is served by three school districts: West Chicago Elementary School District 33 (K-8, serving the north side of Winfield), Winfield Elementary School District 34 (K-8, serving the south side of Winfield), and Community Unit School District 200 (K-12, Wheaton-Warrenville, serving the east side of Winfield). Winfield has no public high school; students from districts 33 and 34 attend West Chicago Community High School and students from CUSD 200 attend Wheaton North. It has two junior high schools, St. John's Catholic (K-8, private), and Winfield Public School.
Winfield is home to one of the oldest taverns in the Chicago suburbs, John's Buffet, founded 1921 by Polish immigrant John Karwoski, grandfather of the current owner, John Karwoski III. John Karwoski was instrumental in the political and economical development of Winfield, and it was his guidance and leadership that took a fledgling prairie town clinging to existence after the railroad boom went bust, and turned it into a viable and livable village.