ZIP Codes in Rialto, CA
Rialto uses 2 ZIP codes, all in San Bernardino County. Pick one below for details, or look up the full nine-digit ZIP+4 for a specific street address.
All 2 Rialto ZIP codes
| ZIP | Type | County | Population |
|---|---|---|---|
| 92376 | standard | San Bernardino | 84,394 |
| 92377 | standard | San Bernardino | 20,814 |
Finding a ZIP+4 in Rialto
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 Rialto 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 Rialto addresses and download it complete.