| Post Office | Spencer |
| Division | Clay |
| Zipcode | 51301 |
| Post Office | Everly |
| Division | Clay |
| Zipcode | 51338 |
| Post Office | Peterson |
| Division | Clay |
| Zipcode | 51047 |
| Post Office | Royal |
| Division | Clay |
| Zipcode | 51357 |
| Post Office | Dickens |
| Division | Clay |
| Zipcode | 51333 |
| Post Office | Webb |
| Division | Clay |
| Zipcode | 51366 |
| Post Office | Greenville |
| Division | Clay |
| Zipcode | 51343 |
| Post Office | Gillett Grove |
| Division | Clay |
| Zipcode | 51341 |
| Post Office | Fostoria |
| Division | Clay |
| Zipcode | 51340 |
25 City in Clay | List of Zip Codes Location In Iowa and Your selected County Clay