O'Fallon, IL ZIP Codes

One ZIP code serves O'Fallon, Illinois: 62269. Together they are home to 35,923 residents in 14,244 households.

O'Fallon city limits (Census)

MeasureCensus figure
Residents32,262
Households12,816
Median household income$105,982
Median home value$295,700
Median age37.8
Median rent$1,332

All 1 ZIP codes together

MeasureValue
Residents (sum of ZIP codes)35,923
Households (sum of ZIP codes)14,244
Median household income, range across ZIP codes$103,818 (62269) to $103,818 (62269)
Household-weighted average of ZIP medians (an approximation, not a true median)$103,818
Homeowners71.3%
Households with kids under 1834.8%
Moved in the past year11.3%
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Every ZIP code in O'Fallon

ZIPMailing cityResidentsHouseholdsMedian incomeHome valueHomeownersWith kidsNew moversCarrier routesMailboxesWhy listed
62269O Fallon35,92314,244$103,818$291,80071.3%34.8%11.3%——48% of its land; mailing city

A ZIP code is listed for O'Fallon when at least 10% of its land lies inside O'Fallon city limits, when it holds at least 10% of the place's land, or when its USPS mailing city is O'Fallon. The table shows which applies. Totals add up whole ZIP codes, so they include any parts outside O'Fallon.

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Frequently asked questions

What ZIP codes are in O'Fallon, IL?
62269. A ZIP code is listed for O'Fallon when at least 10% of its land lies inside O'Fallon city limits, when it holds at least 10% of the place's land, or when its USPS mailing city is O'Fallon.
What is the population of O'Fallon, IL?
The Census Bureau counts 32,262 residents inside O'Fallon city limits (ACS 2020–2024). The 1 ZIP code that serve O'Fallon hold 35,923 residents in all.
What is the median household income in O'Fallon, IL?
$105,982 inside O'Fallon city limits, per the Census Bureau. Across its ZIP codes the medians run from $103,818 to $103,818.

This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.