Fullerton, CA ZIP Codes
Fullerton, California has 8 ZIP codes: 4 for street addresses (, , and ) and 4 for PO boxes (, , and ).
Your street decides which one you use.
Which Fullerton ZIP code is my address in?
Street ranges from the Census Bureau, 2026. PO box and organization ZIP codes are not found by street. A new street may be missing: address not found?
Fullerton ZIP code map
Tap or point to an area to see its ZIP code.Full-size map
92834, 92836, 92837 and 92838 have no area on the map: they are PO box or single-organization ZIP codes. Dashed line: Fullerton city limits.
Map: Census Bureau ZIP Code Tabulation Areas (2020) and place limits (2024).
All Fullerton ZIP codes by type
| ZIP | Type and post office or station |
|---|---|
| 92831 | street delivery Fullerton |
| 92832 | street delivery Fullerton |
| 92833 | street delivery Orangehurst |
| 92834 | PO boxes at the Fullerton post office Fullerton |
| 92835 | street delivery Sunny Hills |
| 92836 | PO boxes at the Commonwealth post office Commonwealth |
| 92837 | PO boxes at the Orangehurst post office Orangehurst |
| 92838 | PO boxes at the Sunny Hills post office Sunny Hills |
Fullerton ZIP code questions
What is the main ZIP code for Fullerton?
92831, the ZIP code of the main Fullerton post office at 1350 E Chapman Ave.
Which Fullerton ZIP codes are for PO boxes only?
92834, 92836, 92837 and 92838. Mail to them goes to boxes at the post office, not to street addresses.
What county is Fullerton in?
Orange County.
ZIP codes for towns near Fullerton
More towns near Fullerton: South Whittier, Stanton, Garden Grove, Whittier, Orange, Cypress, Hacienda Heights, Cerritos, Yorba Linda.
Sources and last checked
USPS ZIP Locale Detail (October 1, 2026), GeoNames (CC BY 4.0), U.S. Census Bureau, HUD-USPS crosswalk.
Checked October 20, 2026. Sources · How we build our lists · Corrections