ZIP Code 94503: American Canyon, CA
County: Napa
Coordinates: 38.16680, -122.25530
ZIP Type: Standard
Time Zone: Pacific Time (PT)
Explore detailed information for ZIP code 94503 in American Canyon, CA. We include verified county details for Napa plus key geographic references used for mapping and logistics.
| Primary City | American Canyon |
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| ZIP Code | 94503 |
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| County | Napa |
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| State | CA |
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| Latitude / Longitude | 38.16680, -122.25530 |
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| ZIP Type | Standard |
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| Time Zone | Pacific Time (PT) |
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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 94503 (not an exact boundary).
Geographic & Administrative Context
Coordinates for 94503 are listed as 38.16680 / -122.25530, useful for GPS and service checks in and around American Canyon, CA.
Local Coverage Notes
ZIP codes can cover multiple neighborhoods and unincorporated areas. Use ZIP 94503 for mail delivery and general location reference in
Napa,
CA.
Some addresses near American Canyon may share this ZIP due to delivery routing and local service areas.
Related ZIP Codes (Nearby)
Explore other postal codes near American Canyon within CA.
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Frequently Asked Questions
What is the primary city for ZIP code 94503?
The primary city for this ZIP code is American Canyon, located in CA.
In which county is 94503 located?
ZIP code 94503 is situated within Napa, CA.
What are the coordinates for 94503?
The approximate center point is 38.16680 (Latitude) and -122.25530 (Longitude).
Is ZIP code 94503 active?
This page lists ZIP 94503 as Listed based on the latest refresh date shown above.
Does ZIP 94503 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