ZIP Codes in San Leandro, CA
San Leandro uses 3 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 3 San Leandro ZIP codes
| ZIP | Type | County | Population |
|---|---|---|---|
| 94577 | standard | Alameda | 46,317 |
| 94578 | standard | Alameda | 41,769 |
| 94579 | standard | Alameda | 20,017 |
Finding a ZIP+4 in San Leandro
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 San Leandro street almost always have different ZIP+4 codes even though they share all five leading digits.
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