Postal reference / United States
91978Spring Valley, California
ZIP code 91978 is a United States postal code for Spring Valley, California. Its county association is San Diego County. The map reference point is at 32.7329, -116.9596.
- State / territory
- California
- Recorded place name
- Spring Valley
- County association
- San Diego
- Estimated coordinate
- 32.7329, -116.9596
View on OpenStreetMap - ZIP prefix
- 919 · 38 ZIP codes share it
- Data source
- GeoNames postal reference, snapshot September 26, 2026
GeoNames reference data. County associations may not include every intersecting county, place names are postal names rather than legal boundaries, and coordinates are approximate. This is not address validation.
Area
- Land area
- 11.94 sq mi (2023 Census Gazetteer)
Figures are for the ZIP Code Tabulation Area (ZCTA) that most closely matches this ZIP code, not an exact match to USPS delivery boundaries. Source: U.S. Census Bureau, 2023 Gazetteer + 2023 ACS 5-Year Estimates, retrieved 2026-09-27. How to read this data.
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California directoryOther ZIP codes in Spring Valley, CA
Spring Valley has 4 ZIP codes in the reference dataset.
Nearby ZIP code reference points
| ZIP code | Place | State | County association | Miles |
|---|---|---|---|---|
| 91977 | Spring Valley | CA | San Diego | 2.3 |
| 91976 | Spring Valley | CA | San Diego | 2.4 |
| 91979 | Spring Valley | CA | San Diego | 2.4 |
| 91941 | La Mesa | CA | San Diego | 3.6 |
| 92019 | El Cajon | CA | San Diego | 3.9 |
| 92020 | El Cajon | CA | San Diego | 4.2 |
| 91946 | Lemon Grove | CA | San Diego | 4.2 |
| 91945 | Lemon Grove | CA | San Diego | 4.2 |
Straight-line distance between reference points. Nearby points do not prove that ZIP areas touch.
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