Alton zipcode
| City | Alton |
| ZIP Code | 51003 |
| Type | Standard |
| State Code | IA |
| State | Iowa |
ZIP code of Alton is 51003. This place is located in Iowa state in US. To send any postal service to Alton, you must use 51003 zipcode.
You should avoid following 1 city name of Iowa to be used with the ZIP code 51003.
- Carnes, IA