El Cajon, California Zip Codes
📍 El Cajon is in San Diego County, California with 5 zip codes; the most populous is 92021.
El Cajon is a USPS city name in San Diego County, California with a Census population of approximately 175,350 across its ZIP codes. San Diego County as a whole has 191 ZIP codes in this directory. Below you'll find every zip code serving El Cajon with population, income and home value, a map, and the city's affordability profile.
Population and demographic data sourced from the U.S. Census Bureau American Community Survey (ACS) 5-Year Estimates. ZIP code routing data sourced from the United States Postal Service (USPS).
All El Cajon Zip Codes
| ZIP Code | City | Details |
|---|---|---|
| 92019 | El Cajon | View → |
| 92020 | El Cajon | View → |
| 92021 | El Cajon | View → |
| 92022 | El Cajon | View → |
| 92090 | El Cajon | View → |
El Cajon at a Glance
El Cajon has 5 ZIP codes in this directory: 3 standard delivery ZIPs and 2 PO Box or unique ZIPs that carry no resident population in Census data. The 3 ZIPs with published Census housing data cover 175,350 residents, the largest being 92021 with 69,638 people.
The median ZIP in El Cajon has a household income of $71,400 and a home value of $675,400, a price-to-income ratio of 8.0, above the 6.7 California ZIP median. Affordability ranges from 92019 at a ratio of 7.2 to 92020, where the median home is $676,200. The highest median income is in 92019 at $93,732. Median rent across these ZIPs is $1,721 a month.
52% of households in the typical El Cajon ZIP own their home (statewide ZIP median 64%). 26% of adults hold a bachelor's degree, below the 31% statewide median. The median poverty rate is 15.9%, above the 10.8% statewide ZIP median. Overall density is about 2,477 residents per square mile across 71 square miles of ZIP land area.
Medians are taken across the ZIP codes listed below (each ZIP weighted equally); PO Box and no-data ZIPs are excluded. Definitions on the methodology page; statewide comparisons in the 2026 California ZIP Code Affordability Report.
El Cajon Zip Code Map
Interactive map of El Cajon, California zip codes. Click any marker for details.