Zip Code 92021 — El Cajon, CA
92021 is a ZIP Code associated with El Cajon, CA, located within San Diego. 92021 ranks #6 out of 115 ZIP codes in San Diego County by population (and #59 out of 1,802 in CA). The area supports an estimated population of 70,501 residents across Data Pending housing units, with a population density of 970.8 people per square mile.
WorldPlaceData database updated: October 2026
📍 View location on OpenStreetMap (32.835140, -116.874620)
| Data Metric | Local Statistic |
|---|
| Postal / Zip Code | 92021 |
| Primary City | El Cajon |
| State / Province | CA |
| County | San Diego |
| Total Population | 70,501 |
| Median Household Income | Data Pending |
| Total Housing Units | Data Pending |
| Population Density | 970.8 people/sq mi |
| Timezone | America/Los_Angeles |
How 92021 Compares
| Metric | ZIP 92021 | San Diego County | CA State Average |
|---|
| Population | 70,501 | 3,322,512 (Total) | 39,286,245 (Total) |
| Average ZIP Income | Data Pending | N/A | N/A |
| Population Density | 970.8 /sq mi | -- | -- |
| County Pop Rank | #6 of 115 | -- | -- |
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 →