California · San Mateo
94028 ZIP Code
94028 is associated with Portola Valley, California. The page shows the county, timezone, nearby ZIPs and links to the state hub for a nearby city generator.
ZIP details
- ZIP code
- 94028
- City
- Portola Valley
- State
- California (CA)
- County
- San Mateo
- Timezone
- America/Los_Angeles
- State sales tax
- Varies by state
Questions about 94028
- 94028 is associated with Portola Valley, California in the bundled dataset. ZIP areas can cross city and county lines, so use the city and county fields together.
- San Mateo. County boundaries and postal areas are not the same thing; a ZIP can serve addresses in more than one county.
- America/Los_Angeles. This is the IANA timezone name for the city associated with the ZIP.
- It appears in the public city dataset bundled with this site. That confirms the format and city association, not that a specific street, mailbox, or resident exists.