ZIP code · Saint Charles · Missouri · United States
ZIP code 63303 — Saint Charles
ZIP code 63303 serves Saint Charles, Missouri.
- Postal code
- 63303Single source Value from one source, not cross-checked.
- City
- Saint Charles
- County
- Saint Charles
- State
- Missouri
- Country
- United States
- Coordinates
- 38.7622, -90.5471 — precision precise (locality)
View on OpenStreetMap - Population
- 46,627 (ZCTA, ACS 5-year)
- Median household income
- $98,031
- Median age
- 41.2
Nearby localities
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