| Place | Postal Code |
|---|---|
| Postal/ZIP Codes in Arakawa, Iwate (荒川) | 028-1303 |
| Postal/ZIP Codes in Chuocho, Iwate (中央町) | 028-1332 |
| Postal/ZIP Codes in Funakoshi, Iwate (船越) | 028-1371 |
| Postal/ZIP Codes in Hachimancho, Iwate (八幡町) | 028-1341 |
| Postal/ZIP Codes in Iioka, Iwate (飯岡) | 028-1352 |
| Postal/ZIP Codes in Ishitoge, Iwate (石峠) | 028-1301 |
| Postal/ZIP Codes in Kawamukaicho, Iwate (川向町) | 028-1342 |
| Postal/ZIP Codes in Kitahamacho, Iwate (北浜町) | 028-1331 |
| Postal/ZIP Codes in Korakucho, Iwate (後楽町) | 028-1333 |
| Postal/ZIP Codes in Nagasaki, Iwate (長崎) | 028-1351 |
| Postal/ZIP Codes in Orikasa, Iwate (織笠) | 028-1361 |
| Postal/ZIP Codes in Osawa, Iwate (大沢) | 028-1311 |
| Postal/ZIP Codes in Others, Iwate (その他) | 028-1300 |
| Postal/ZIP Codes in Sakaidacho, Iwate (境田町) | 028-1343 |
| Postal/ZIP Codes in Toyomane, Iwate (豊間根) | 028-1302 |
| Postal/ZIP Codes in Yamada, Iwate (山田) | 028-1321 |