ZIP Codes in La Mesa, CA
La Mesa uses 2 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 2 La Mesa ZIP codes
| ZIP | Type | County | Population |
|---|---|---|---|
| 91941 | standard | San Diego | 33,218 |
| 91942 | standard | San Diego | 41,424 |
Finding a ZIP+4 in La Mesa
Knowing which of these 2 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 La Mesa 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 La Mesa addresses and download it complete.