ZIP code 91788
Where is ZIP code 91788?
Walnut, California
Los Angeles County · PO Box only ZIP code
ZIP code 91788 belongs to Walnut, California in Los Angeles County. 91788 is a PO Box only ZIP code: it is used for post office boxes at the Walnut post office, not for street addresses. It is in the Pacific Time zone and uses area code 909. The closest ZIP codes are 91789 (Walnut, 0.6 mi east), 91792 (West Covina, 1.9 mi west) and 91748 (Rowland Heights, 3.2 mi southwest).
| ZIP code | 91788 |
|---|---|
| Type | PO Box only (no street delivery) |
| Status | Active |
| City | Walnut |
| State | California (CA) |
| County | Los Angeles County |
| Time zone | Pacific Time · now |
| Area code | 909 |
| Coordinates | 34.0203, -117.8653 map |
| 3-digit prefix | 917 |
The Census Bureau doesn’t publish population figures for po box only ZIP codes because nobody lives at a PO Box or a single organization’s address. For figures about the area, see the nearby standard ZIP codes below.
ZIP codes near 91788
| ZIP code | City | Distance | Type |
|---|---|---|---|
| 91789 | Walnut, CA | 0.6 mi E | Standard |
| 91792 | West Covina, CA | 1.9 mi W | Standard |
| 91748 | Rowland Heights, CA | 3.2 mi SW | Standard |
| 91765 | Diamond Bar, CA | 3.3 mi E | Standard |
| 91791 | West Covina, CA | 3.6 mi NW | Standard |
| 91744 | La Puente, CA | 4.2 mi W | Standard |
| 91723 | Covina, CA | 4.7 mi N | Standard |
| 91747 | La Puente, CA | 4.8 mi W | PO Box only |
| 91749 | La Puente, CA | 4.8 mi W | PO Box only |
| 91724 | Covina, CA | 5.1 mi N | Standard |
| 91790 | West Covina, CA | 5.2 mi NW | Standard |
| 91714 | City Of Industry, CA | 5.3 mi W | PO Box only |
Straight-line distance between ZIP code center points. Find every ZIP code within 10 miles of 91788 or measure the distance to another ZIP code.
How to address mail to 91788
PO BOX 123
WALNUT CA 91788
Put the city, the two-letter state code and the ZIP code on the last line. Adding the 4-digit ZIP+4 code (91788-XXXX) helps mail sort faster but isn’t required.
Other ZIP codes in Walnut, CA
All Walnut ZIP codes with population and income →
Questions
- What city is ZIP code 91788?
- 91788 is a Walnut, California ZIP code.
- What county is 91788 in?
- ZIP code 91788 is in Los Angeles County, California.
- What time zone is ZIP code 91788 in?
- 91788 is in the Pacific Time zone (America/Los_Angeles).
- What area code is 91788?
- Phone numbers in ZIP code 91788 use area code 909.
- Can I use 91788 for a street address?
- No. 91788 is only for PO Boxes. Street addresses in Walnut use 91789.
- What ZIP codes are near 91788?
- The nearest ZIP codes to 91788 are 91789 (Walnut, 0.6 miles), 91792 (West Covina, 1.9 miles), 91748 (Rowland Heights, 3.2 miles) and 91765 (Diamond Bar, 3.3 miles).