Walnut zipcode
| City | Walnut |
| ZIP Code | 66780 |
| Type | Standard |
| State Code | KS |
| State | Kansas |
ZIP code of Walnut is 66780. This place is located in Kansas state in US. To send any postal service to Walnut, you must use 66780 zipcode.
You should avoid following 1 city name of Kansas to be used with the ZIP code 66780.
- Porterville, KS