| Locality | Postal Code |
|---|---|
| Joban Fujiwaramachi (いわき市) | 972-8326 |
| Joban Iwagaokamachi (いわき市) | 972-8313 |
| Joban Kamiyadamachi (いわき市) | 971-8131 |
| Joban Kamiyunagayamachi (いわき市) | 972-8322 |
| Joban Madamamachi (いわき市) | 972-8314 |
| Joban Matsugadai (いわき市) | 972-8323 |
| Joban Matsukusunemachi (いわき市) | 971-8137 |
| Joban Misawamachi (いわき市) | 971-8136 |
| Joban Mizunoyamachi (いわき市) | 972-8311 |
| Joban Nishigomachi (いわき市) | 972-8316 |
| Joban Osamagomachi (いわき市) | 972-8315 |
| Joban Sekifunemachi (いわき市) | 972-8318 |
| Joban Shimofunaomachi (いわき市) | 972-8312 |
| Joban Shimoyunagayamachi (いわき市) | 972-8317 |
| Joban Shiratorimachi (いわき市) | 972-8325 |
| Joban Yumotomachi (いわき市) | 972-8321 |
| Jugaoka (いわき市) | 970-8033 |
| Kaneyamamachi (いわき市) | 974-8211 |
| Kashimamachi Funado (いわき市) | 971-8145 |
| Kashimamachi Hashirikuma (いわき市) | 971-8141 |
| Kashimamachi Iida (いわき市) | 971-8134 |
| Kashimamachi Kamikuramochi (いわき市) | 971-8142 |
| Kashimamachi Kashima (いわき市) | 971-8139 |
| Kashimamachi Komoda (いわき市) | 971-8133 |
| Kashimamachi Kubo (いわき市) | 971-8144 |
| Kashimamachi Miyo (いわき市) | 971-8146 |