Zip Code 91901 — Alpine, CA
91901 is a ZIP Code associated with Alpine, CA, located within San Diego. The postal region supports an estimated population of 18,197 residents across Data Pending housing units, with a population density of 90.2 people per square mile.
WorldPlaceData database updated: October 2026
📍 View location on OpenStreetMap (32.814670, -116.719290)
| Data Metric | Local Statistic |
|---|
| Postal / Zip Code | 91901 |
| Primary City | Alpine |
| State / Province | CA |
| County | San Diego |
| Total Population | 18,197 |
| Median Household Income | Data Pending |
| Total Housing Units | Data Pending |
| Population Density | 90.2 people/sq mi |
| Timezone | America/Los_Angeles |
How 91901 Compares
| Metric | ZIP 91901 | San Diego County | CA State Average |
|---|
| Population | 18,197 | 3,322,512 | 39,286,245 |
| Median Income | Data Pending | N/A | N/A |
| Population Density | 90.2 /sq mi | -- | -- |
Nearby ZIP Codes
Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →