Zip code 91788: Walnut, California
This zip has no delivery boundary. The map shows its post office location and nearby zip codes.
About 91788
91788 is a non-residential zip code for Walnut, California (Los Angeles County). It has no delivery area of its own, so the Census Bureau doesn't publish population or housing figures for it. Codes like this are usually assigned to post office boxes, or to a single organization such as a university, hospital, government agency or large company that gets enough mail to need its own zip code.
For a picture of the people who live around 91788, see the residential zip codes in the nearby list below.
Geography
- City (USPS)
- Walnut
- State
- California
- County
- Los Angeles County
- Center point
- 34.0203° N, 117.8653° W
- Time zone
- Pacific Time (UTC-8, UTC-7 in summer)
- Zip type
- PO box or unique zip
Zip codes near 91788
| Zip | City | Distance | IncomeMedian income |
|---|---|---|---|
| 91789 | Walnut, CA | 0.6 mi | $125,720 |
| 91792 | West Covina, CA | 2.1 mi | $94,817 |
| 91791 | West Covina, CA | 3.2 mi | $102,266 |
| 91748 | Rowland Heights, CA | 3.6 mi | $83,428 |
| 91765 | Diamond Bar, CA | 3.9 mi | $105,565 |
| 91724 | Covina, CA | 4.1 mi | $103,163 |
| 91744 | La Puente, CA | 4.2 mi | $93,557 |
| 91723 | Covina, CA | 4.6 mi | $94,167 |
| 91747 | La Puente, CA · PO box | 4.8 mi | — |
| 91749 | La Puente, CA · PO box | 4.8 mi | — |
| 91768 | Pomona, CA | 5.2 mi | $76,041 |
| 91790 | West Covina, CA | 5.2 mi | $102,927 |
Questions about 91788
What city is zip code 91788?
91788 is assigned to Walnut, California. The city name is the one the Postal Service prefers for mail addressed to this zip code.
What county is 91788 in?
91788 is in Los Angeles County, California.
What time zone is 91788 in?
91788 is in Pacific Time.
What zip codes are near 91788?
The closest zip codes to 91788 are 91789, 91792, 91791, 91748, 91765.
Demographic figures are 2020–2024 American Community Survey 5-year estimates for ZIP Code Tabulation Area 91788, from the U.S. Census Bureau. Small areas have wide margins of error. How we build these numbers.