ZIP Code 91788

Walnut, California

ZIP Code Information

ZIP Code91788
City Walnut
State California (CA)
CountyLos Angeles
Timezone America/Los_Angeles (UTC-7) Details
Area Codes (state) 209, 213, 310, 415, 510, 619, 626, 650, 714, 818, 916, 949 Details

ZIP code 91788 is a five-digit postal code used by the United States Postal Service for addresses in Walnut, California. The ZIP lies within Los Angeles County. Clocks here follow the America/Los_Angeles time zone (UTC-7).

What you can do with ZIP code 91788

  • Write a mailing address: Walnut, CA 91788. The ZIP goes last, after the state abbreviation.
  • Check whether a shipping or delivery quote applies to this area — most US carriers price by ZIP code rather than by city.
  • Look up the local time zone before scheduling a call — the ZIP tells you which zone applies to that address.
  • Compare the ZIP with neighbouring codes to see how population and income shift block by block.

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Nearby ZIP Codes

Radius search
ZIP CodeCityDistance
91789 Walnut 1 km Distance
91792 West Covina 3 km Distance
91748 Rowland Heights 5.2 km Distance
91765 Diamond Bar 5.3 km Distance
91791 West Covina 5.8 km Distance
91744 La Puente 6.7 km Distance
91723 Covina 7.5 km Distance
91749 La Puente 7.8 km Distance
91747 La Puente 7.8 km Distance
91724 Covina 8.2 km Distance

Frequently Asked Questions

ZIP code 91788 is located in Walnut, California.

ZIP code 91788 is in Los Angeles county, California.

ZIP code 91788 is in the America/Los_Angeles timezone.