Winfield is an incorporated village located in Milton and Winfield Townships, DuPage County, Illinois, United States. The population was 9,080 at the 2010 census.
The Village of Winfield was incorporated as a village in 1921, but has roots from the 1830s, originally known as Gary's Mill after early settler Eurastus Gary, and later, Fredricksburg, owing to a significant German-speaking population. In the late 1800s, the settlement’s name was changed again to Winfield after the war hero Winfield Scott.Winfield is home to one of the oldest taverns in the Chicago suburbs, John's Restaurant and Tavern (formerly John's Buffet), founded in 1921 by immigrant John T Karwoski, grandfather of the current owner, John Karwoski III.John Karwoski was instrumental in the political and economic 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. Mr Karwoski became the first Chief of the all-volunteer Winfield Volunteer Fire Company in 1935. 45 years later, his son John Karwoski II was made Chief of the expanded Winfield Fire Protection District in 1980.