Portola Valley zipcode
| City | Portola Valley |
| ZIP Code | 94028 |
| Type | Standard |
| State Code | CA |
| State | California |
ZIP code of Portola Valley is 94028. This place is located in California state in US. To send any postal service to Portola Valley, you must use 94028 zipcode.
The ZIP code 94028 is also used with 2 more city names of California.
- Menlo Park, CA
- Portola Vally, CA
You should avoid following 1 city name of California to be used with the ZIP code 94028.
- Menlo Pk, CA