ZIP Code 63366: O Fallon, MO
County: Saint Charles County
Coordinates: 38.82390, -90.74270
ZIP Type: Standard
Time Zone: Central Time (CT)
Get a reliable snapshot of the O Fallon, MO postal area 63366. This page summarizes county, coordinates, and local facts to help with services and location research.
| Primary City | O Fallon |
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| ZIP Code | 63366 |
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| County | Saint Charles County |
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| State | MO |
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| Latitude / Longitude | 38.82390, -90.74270 |
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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 63366 (not an exact boundary).
Geographic & Administrative Context
For mapping and verification, 63366 is commonly represented around 38.82390, -90.74270. 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 63366 for mail delivery and general location reference in
Saint Charles County,
MO.
Some addresses near O Fallon may share this ZIP due to delivery routing and local service areas.
Related ZIP Codes (Nearby)
Explore other postal codes near O Fallon within MO.
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Frequently Asked Questions
What is the primary city for ZIP code 63366?
The primary city for this ZIP code is O Fallon, located in MO.
In which county is 63366 located?
ZIP code 63366 is situated within Saint Charles County, MO.
What are the coordinates for 63366?
The approximate center point is 38.82390 (Latitude) and -90.74270 (Longitude).
Is ZIP code 63366 active?
This page lists ZIP 63366 as Listed based on the latest refresh date shown above.
Does ZIP 63366 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