| Place | Postal Code |
|---|---|
| Postal/ZIP Codes in Iwaikawa, Akita (岩井川) | 019-0802 |
| Postal/ZIP Codes in Others, Akita (その他) | 019-0800 |
| Postal/ZIP Codes in Tagonai, Akita (田子内) | 019-0801 |
| Postal/ZIP Codes in Tsubakikawa, Akita (椿川) | 019-0803 |
| Postal Codes in Ogachi | |
|---|---|
| Postal/ZIP Codes in Ugo (羽後町) | |
| Postal/ZIP Codes in Higashinaruse (東成瀬村) | |