ZIP Code 91978: Spring Valley, CA
County: San Diego County
Coordinates: 32.73290, -116.95960
ZIP Type: Standard
Time Zone: Pacific Time (PT)
This profile provides an in-depth look at ZIP code 91978, serving Spring Valley in CA. It lies in San Diego County and supports delivery, planning, and address verification.
| Primary City | Spring Valley |
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| ZIP Code | 91978 |
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| County | San Diego County |
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| State | CA |
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| Latitude / Longitude | 32.73290, -116.95960 |
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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 91978 (not an exact boundary).
Geographic & Administrative Context
The geographic center of ZIP code 91978 is approximately 32.73290 (latitude) and -116.95960 (longitude). This location sits within San Diego County, contributing to regional planning across CA.
Local Coverage Notes
ZIP codes can cover multiple neighborhoods and unincorporated areas. Use ZIP 91978 for mail delivery and general location reference in
San Diego County,
CA.
Coverage may include nearby neighborhoods and adjacent unincorporated areas commonly associated with Spring Valley.
Related ZIP Codes (Nearby)
Explore other postal codes near Spring Valley within CA.
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Frequently Asked Questions
What is the primary city for ZIP code 91978?
The primary city for this ZIP code is Spring Valley, located in CA.
In which county is 91978 located?
ZIP code 91978 is situated within San Diego County, CA.
What are the coordinates for 91978?
The approximate center point is 32.73290 (Latitude) and -116.95960 (Longitude).
Is ZIP code 91978 active?
This page lists ZIP 91978 as Listed based on the latest refresh date shown above.
Does ZIP 91978 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