ZIP Code 94546: Castro Valley, CA
County: Alameda County
Coordinates: 37.70150, -122.07820
ZIP Type: Standard
Time Zone: Pacific Time (PT)
Explore detailed information for ZIP code 94546 in Castro Valley, CA. We include verified county details for Alameda County plus key geographic references used for mapping and logistics.
| Primary City | Castro Valley |
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| ZIP Code | 94546 |
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| County | Alameda County |
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| State | CA |
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| Latitude / Longitude | 37.70150, -122.07820 |
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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 94546 (not an exact boundary).
Geographic & Administrative Context
The geographic center of ZIP code 94546 is approximately 37.70150 (latitude) and -122.07820 (longitude). This location sits within Alameda County, contributing to regional planning across CA.
Local Coverage Notes
ZIP codes can cover multiple neighborhoods and unincorporated areas. Use ZIP 94546 for mail delivery and general location reference in
Alameda County,
CA.
Some addresses near Castro Valley may share this ZIP due to delivery routing and local service areas.
Related ZIP Codes (Nearby)
Explore other postal codes near Castro Valley within CA.
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Frequently Asked Questions
What is the primary city for ZIP code 94546?
The primary city for this ZIP code is Castro Valley, located in CA.
In which county is 94546 located?
ZIP code 94546 is situated within Alameda County, CA.
What are the coordinates for 94546?
The approximate center point is 37.70150 (Latitude) and -122.07820 (Longitude).
Is ZIP code 94546 active?
This page lists ZIP 94546 as Listed based on the latest refresh date shown above.
Does ZIP 94546 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