ZIP Code 63303: Saint Charles, MO
County: Saint Charles County
Coordinates: 38.76220, -90.54710
ZIP Type: Standard
Time Zone: Central Time (CT)
This profile provides an in-depth look at ZIP code 63303, serving Saint Charles in MO. It lies in Saint Charles County and supports delivery, planning, and address verification.
| Primary City | Saint Charles |
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| ZIP Code | 63303 |
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| County | Saint Charles County |
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| State | MO |
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| Latitude / Longitude | 38.76220, -90.54710 |
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| ZIP Type | Standard |
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| Time Zone | Central Time (CT) |
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| Data Updated | 2026-01-08 |
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Maps & Useful Links
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These links show the approximate center point for ZIP 63303 (not an exact boundary).
Geographic & Administrative Context
For mapping and verification, 63303 is commonly represented around 38.76220, -90.54710. These coordinates help identify the general area within Saint Charles County, MO.
Local Coverage Notes
ZIP codes can cover multiple neighborhoods and unincorporated areas. Use ZIP 63303 for mail delivery and general location reference in
Saint Charles County,
MO.
Some addresses near Saint Charles may share this ZIP due to delivery routing and local service areas.
Related ZIP Codes (Nearby)
Explore other postal codes near Saint Charles within MO.
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Frequently Asked Questions
What is the primary city for ZIP code 63303?
The primary city for this ZIP code is Saint Charles, located in MO.
In which county is 63303 located?
ZIP code 63303 is situated within Saint Charles County, MO.
What are the coordinates for 63303?
The approximate center point is 38.76220 (Latitude) and -90.54710 (Longitude).
Is ZIP code 63303 active?
This page lists ZIP 63303 as Listed based on the latest refresh date shown above.
Does ZIP 63303 cover multiple areas?
Yes. Many ZIP codes cover multiple neighborhoods or nearby areas. For exact boundaries, use official mapping tools.
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Methodology & Data Notes
How we build this page: We generate this page from a structured ZIP dataset and refresh key fields (city, county, and coordinates) during scheduled updates. Coordinates represent an approximate center point, not an official boundary map.
Sources: Public ZIP reference datasets and geographic coordinate references. If you use specific sources (e.g., USPS, Census), list them on your About/Methodology page.
Page updated: 2026-01-08