Walnut California is covered by a total of 2 ZIP Codes. The ZIP Codes in Walnut range from 91788 to 91789. Of the ZIP codes within or partially within Walnut there are 1 Standard ZIP Codes and 1 PO Box ZIP Codes. The total population of ZIP Codes in Walnut is 41377.
Click on the ZIP Codes in the interactive map to view more information. The map control in the upper right corner can be used to toggle map layers on and off. The red outline is the border of Walnut and can be turned on and off. Each type of postal code can also be turned on and off.
| ZIP Code | ZIP Code City/Town | ZIP Code Type | |||
|---|---|---|---|---|---|
| Walnut | PO Box | |||
| Walnut | Standard |