| Place | Postal Code |
|---|---|
| Postal/ZIP Codes in Aioi, Hokkaido (相生) | 045-0023 |
| Postal/ZIP Codes in Higashiyama, Hokkaido (東山) | 045-0002 |
| Postal/ZIP Codes in Kiyozumi, Hokkaido (清住) | 045-0022 |
| Postal/ZIP Codes in Mandai, Hokkaido (万代) | 045-0003 |
| Postal/ZIP Codes in Misaki, Hokkaido (御崎) | 045-0026 |
| Postal/ZIP Codes in Miyazono, Hokkaido (宮園) | 045-0012 |
| Postal/ZIP Codes in Nozuka, Hokkaido (野束) | 045-0024 |
| Postal/ZIP Codes in Ohama, Hokkaido (大浜) | 045-0001 |
| Postal/ZIP Codes in Others, Hokkaido (その他) | 045-0000 |
| Postal/ZIP Codes in Sakae, Hokkaido (栄) | 045-0011 |
| Postal/ZIP Codes in Shikishimanai, Hokkaido (敷島内) | 045-0025 |
| Postal/ZIP Codes in Takadai, Hokkaido (高台) | 045-0013 |
| Postal/ZIP Codes in Yamato, Hokkaido (大和) | 045-0021 |
| Postal Codes in Iwanai | |
|---|---|
| Postal/ZIP Codes in Kyowa (共和町) | |
| Postal/ZIP Codes in Iwanai (岩内町) | |