Mason City zipcode
| City | Mason City |
| ZIP Code | 50401 |
| Type | Standard |
| State Code | IA |
| State | Iowa |
ZIP code of Mason City is 50401. This place is located in Iowa state in US. To send any postal service to Mason City, you must use 50401 zipcode.
You should avoid following 6 city names of Iowa to be used with the ZIP code 50401.
- Central Heights, IA
- Emery, IA
- Freeman, IA
- Hanford, IA
- Portland, IA
- Winnebago Heights, IA