ZIP code · Saint Charles · Missouri · United States

ZIP code 63303 — Saint Charles

Name: Saint Charles (63303)
Address: Missouri, 63303, US

ZIP code 63303 serves Saint Charles, Missouri.

Postal code: 63303
Single 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)
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Nearby localities

63301Saint Charles
63302Saint Charles
63304Saint Charles

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. Data generated on 2026-08-21. Methodology · Report an error on this page