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Zip Code 61531 — Farmington, IL

61531 is a ZIP Code associated with Farmington, IL, located within Fulton. The postal region supports an estimated population of 3,007 residents across Data Pending housing units, with a population density of 20.6 people per square mile.
WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (40.682910, -90.034820)

Data MetricLocal Statistic
Postal / Zip Code61531
Primary CityFarmington
State / ProvinceIL
CountyFulton
Total Population3,007
Median Household IncomeData Pending
Total Housing UnitsData Pending
Population Density20.6 people/sq mi
TimezoneAmerica/Chicago

How 61531 Compares

MetricZIP 61531Fulton CountyIL State Average
Population3,00733,48712,694,745
Median IncomeData PendingN/AN/A
Population Density20.6 /sq mi----

Nearby ZIP Codes

ZIP CodeCityDistancePopulationMedian Income
Zip 61553Norris4.3 mi303N/A
Zip 61432Fairview7.0 mi544N/A
Zip 61569Trivoli7.4 mi938N/A
Zip 61572Yates City7.9 mi732N/A
Zip 61529Elmwood8.5 mi2,763N/A

Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →