ZIP code · O Fallon · Illinois · United States

ZIP code 62269 — O Fallon

ZIP code 62269 serves O Fallon, Illinois.

Postal code
62269
Single source Value from one source, not cross-checked.
City
O Fallon
County
St. Clair FIPS 17163
State
Illinois
Country
United States
Coordinates
38.5718, -89.8957 — precision precise (locality)
View on OpenStreetMap
Population
35,536 (ZCTA, ACS 5-year)
Population density
1,191 / sq mi
Land area
29.8 sq mi (77.3 km²) (ZCTA, ACS 5-year)
Median household income
$100,167
Per-capita income
$50,316
Median age
37.2
Households
13,872
Housing units
14,616
Median home value
$274,200
Median gross rent
$1,258 / month
Congressional districts
IL-12 (also IL-13) (119th Congress)
USDA hardiness zone
7a (0 to 5 °F)
Planting / growing zone from the 2023 USDA Plant Hardiness Zone Map: average annual extreme minimum temperature, 1991–2020.
Time zone
America/Chicago (UTC−6 / UTC−5 DST)
Area codes
618, 730
Telephone area codes serving this ZIP (NANPA central-office assignments). A ZIP and an area code are different boundaries; at a border both codes may apply.

Climate — monthly normals

Warmest month Jul (avg high 90°F), coldest Jan (avg low 24°F).

JanFebMarAprMayJunJulAugSepOctNovDec
Avg high °F434959717987908983735846
Avg low °F242836465665686557473728
Precip in2.62.23.44.95.04.64.03.93.43.13.62.6

NOAA 1991–2020 climate normals from the nearest station: BELLEVILLE SIU RSCH (4.5 mi) · NOAA NCEI

Places in ZIP 62269

Places mapped inside this ZIP’s ZCTA area in OpenStreetMap. OSM is community-maintained: counts reflect what has been mapped, and completeness varies by area — treat them as at-least figures. © OpenStreetMap contributors (ODbL) · Methodology

About this page

US ZIP codes have five digits. They are postal routing areas, not administrative boundaries: a ZIP can span more than one city or county, and the city shown is the primary USPS name for that code.

GeoNames · U.S. Census Bureau (ACS) · U.S. Census Bureau · NOAA NCEI · usda-phzm. Data generated on 2026-08-21. Methodology · Report an error on this page