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Fairfield, IL ZIP code

The ZIP code for Fairfield, Illinois is 62837. It is in Wayne County.

Population in these ZIPs
7,868
Avg. median income
$50,500population-weighted
Typical home value
$105,400population-weighted
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ZIP codes within 10 miles

Fairfield, IL ZIP code list

Fairfield, IL ZIP codes
ZIP codePopulationMedian incomeTypical home value
628377,868$50,536$105,400

Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology

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Frequently asked questions

What is the ZIP code for Fairfield, IL?

The ZIP code for Fairfield, IL is 62837.

What county is Fairfield, Illinois in?

Fairfield ZIP codes are in Wayne County.