O Fallon, IL ZIP code
The ZIP code for O Fallon, Illinois is 62269. It is in St. Clair County.
- Population in these ZIPs
- 35,923
- Avg. median income
- $103,800population-weighted
- Typical home value
- $312,000population-weighted
- Metro area
- St. Louis, MO-IL
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O Fallon, IL ZIP code list
| ZIP code | Population | Median income | Typical home value |
|---|---|---|---|
| 62269 | 35,923 | $103,818 | $312,000 |
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
Cities near O Fallon
- Fairview Heights 5 mi
- Lebanon 5 mi
- Scott Air Force Base 5 mi
- Caseyville 5 mi
- Collinsville 7 mi
- Troy 8 mi
- Belleville 8 mi
- Summerfield 9 mi
- Maryville 9 mi
- Saint Jacob 10 mi
- Glen Carbon 11 mi
- East Saint Louis 11 mi
Frequently asked questions
What is the ZIP code for O Fallon, IL?
The ZIP code for O Fallon, IL is 62269.
What county is O Fallon, Illinois in?
O Fallon ZIP codes are in St. Clair County.