| Burchinal, Cerro Gordo |
50469 |
| Cartersville, Cerro Gordo |
50469 |
| Central Heights, Cerro Gordo |
50401 |
| Clear Lake, Cerro Gordo |
50428 |
| Dougherty, Cerro Gordo |
50433 |
| Emery, Cerro Gordo |
50401 |
| Fertile, Cerro Gordo |
50434 |
| Freeman, Cerro Gordo |
50401 |
| Hanford, Cerro Gordo |
50401 |
| Hanlontown, Cerro Gordo |
50444 |
| Mason City, Cerro Gordo |
50401 |
| Meservey, Cerro Gordo |
50457 |
| Nora Springs, Cerro Gordo |
50458 |
| Plymouth, Cerro Gordo |
50464 |
| Portland, Cerro Gordo |
50401 |
| Rock Falls, Cerro Gordo |
50467 |
| Rockford, Cerro Gordo |
50468 |
| Rockwell, Cerro Gordo |
50469 |
| Swaledale, Cerro Gordo |
50477 |
| Thornton, Cerro Gordo |
50479 |
| Ventura, Cerro Gordo |
50482 |
| Winnebago Heights, Cerro Gordo |
50401 |