ZIP Codes in El Cajon, CA
El Cajon uses 3 ZIP codes, all in San Diego County. Pick one below for details, or look up the full nine-digit ZIP+4 for a specific street address.
All 3 El Cajon ZIP codes
| ZIP | Type | County | Population |
|---|---|---|---|
| 92019 | standard | San Diego | 45,351 |
| 92020 | standard | San Diego | 57,842 |
| 92021 | standard | San Diego | 70,501 |
Finding a ZIP+4 in El Cajon
Knowing which of these 3 ZIP codes covers an address only gets you partway. The four-digit extension identifies the specific delivery point — typically one side of one block. Two houses facing each other on the same El Cajon street almost always have different ZIP+4 codes even though they share all five leading digits.
Appending ZIP+4 to a mailing list?
Upload a CSV of El Cajon addresses and download it complete.