ZIP Codes in Hayward, CA
Hayward uses 4 ZIP codes, all in Alameda County. Pick one below for details, or look up the full nine-digit ZIP+4 for a specific street address.
All 4 Hayward ZIP codes
| ZIP | Type | County | Population |
|---|---|---|---|
| 94541 | standard | Alameda | 67,139 |
| 94542 | standard | Alameda | 14,871 |
| 94544 | standard | Alameda | 76,947 |
| 94545 | standard | Alameda | 32,843 |
Finding a ZIP+4 in Hayward
Knowing which of these 4 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 Hayward 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 Hayward addresses and download it complete.