| Place | Postal Code |
|---|---|
| Postal/ZIP Codes in Bo, Iwate (坊) | 028-4422 |
| Postal/ZIP Codes in Daibo, Iwate (大坊) | 028-4302 |
| Postal/ZIP Codes in Ekarinai, Iwate (江刈内) | 028-4303 |
| Postal/ZIP Codes in Hakita, Iwate (葉木田) | 028-4425 |
| Postal/ZIP Codes in Ikkatai, Iwate (一方井) | 028-4421 |
| Postal/ZIP Codes in Itsukaichi, Iwate (五日市) | 028-4307 |
| Postal/ZIP Codes in Kawaguchi, Iwate (川口) | 028-4211 |
| Postal/ZIP Codes in Kodaki, Iwate (子抱) | 028-4304 |
| Postal/ZIP Codes in Kubo, Iwate (久保) | 028-4305 |
| Postal/ZIP Codes in Kuroishi, Iwate (黒石) | 028-4424 |
| Postal/ZIP Codes in Kuronai, Iwate (黒内) | 028-4426 |
| Postal/ZIP Codes in Mido, Iwate (御堂) | 028-4306 |
| Postal/ZIP Codes in Numakunai, Iwate (沼宮内) | 028-4301 |
| Postal/ZIP Codes in Others, Iwate (その他) | 028-4300 |
| Postal/ZIP Codes in Tsuchikawa, Iwate (土川) | 028-4423 |