Palo Alto zipcode
| City | Palo Alto |
| ZIP Code | 94309 |
| Type | PO Box |
| State Code | CA |
| State | California |
ZIP code of Palo Alto is 94309. This place is located in California state in US. To send any postal service to Palo Alto, you must use 94309 zipcode.
The ZIP code 94309 is also used with 1 more city name of California.
- Stanford, CA