Postal reference / United States
91108San Marino, California
ZIP code 91108 is a United States postal code for San Marino, California. Its county association is Los Angeles County. The map reference point is at 34.1207, -118.1117.
- State / territory
- California
- Recorded place name
- San Marino
- County association
- Los Angeles
- Estimated coordinate
- 34.1207, -118.1117
View on OpenStreetMap - ZIP prefix
- 911 · 27 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
- 3.789 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.
Need the last four digits?
ZIP+4 depends on the full delivery address. A five-digit code alone cannot determine its extension.
Find ZIP+4Explore California
Browse the other 2,592 ZIP codes recorded for California, sorted by code with place and county.
California directoryOther ZIP codes in San Marino, CA
San Marino has 2 ZIP codes in the reference dataset.
- 91118Los Angeles
Nearby ZIP code reference points
| ZIP code | Place | State | County association | Miles |
|---|---|---|---|---|
| 91118 | San Marino | CA | Los Angeles | 0.3 |
| 91775 | San Gabriel | CA | Los Angeles | 1.5 |
| 91778 | San Gabriel | CA | Los Angeles | 1.7 |
| 91106 | Pasadena | CA | Los Angeles | 1.8 |
| 91802 | Alhambra | CA | Los Angeles | 2.0 |
| 91804 | Alhambra | CA | Los Angeles | 2.0 |
| 91896 | Alhambra | CA | Los Angeles | 2.0 |
| 91899 | Alhambra | CA | Los Angeles | 2.0 |
Straight-line distance between reference points. Nearby points do not prove that ZIP areas touch.
Verify a mailing address
For mailing, confirm the complete street or PO Box address with USPS. A place record does not confirm delivery eligibility or the ZIP+4 extension.
Open USPS address lookup