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Fairfield is located in Illinois. Fairfield, Illinois has a population of 4,298. Fairfield is less family-centric than the surrounding county with 20% of the households containing married families with children. The county average for households married with children is 27%.
The median household income in Fairfield, IL is $40,033. The median household income for the surrounding county is $48,162 compared to the national median of $57,525. The median age of people living in Fairfield is 43 years old.Learn more about Real Estate.