ZIP code · O Fallon · Missouri · United States
ZIP code 63368 — O Fallon
ZIP code 63368 serves O Fallon, Missouri.
- Postal code
- 63368Single source Value from one source, not cross-checked.
- City
- O Fallon
- County
- Saint Charles
- State
- Missouri
- Country
- United States
- Coordinates
- 38.7513, -90.7296 — precision precise (locality)
View on OpenStreetMap - Population
- 45,862 (ZCTA, ACS 5-year)
- Median household income
- $118,811
- Median age
- 38.1
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 · census-acs5. Data generated on 2026-08-21. Methodology · Report an error on this page