ZIP Codes in Palo Alto, CA
Palo Alto uses 4 ZIP codes, all in Santa Clara County. Pick one below for details, or look up the full nine-digit ZIP+4 for a specific street address.
All 4 Palo Alto ZIP codes
| ZIP | Type | County | Population |
|---|---|---|---|
| 94301 | standard | Santa Clara | 17,508 |
| 94303 | standard | Santa Clara | 46,879 |
| 94304 | standard | Santa Clara | 5,000 |
| 94306 | standard | Santa Clara | 27,183 |
Finding a ZIP+4 in Palo Alto
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 Palo Alto street almost always have different ZIP+4 codes even though they share all five leading digits.
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