Winfield is located in Illinois. Winfield, Illinois has a population of 9,641. Winfield is less family-centric than the surrounding county with 33.12% of the households containing married families with children. The county average for households married with children is 37.15%.
The median household income in Winfield, Illinois is $102,750. The median household income for the surrounding county is $84,442 compared to the national median of $57,652. The median age of people living in Winfield is 47.3 years.
The average high temperature in July is 85.1 degrees, with an average low temperature in January of 15.5 degrees. The average rainfall is approximately 38 inches per year, with 28 inches of snow per year.