| Place | Postal Code |
|---|---|
| Postal/ZIP Codes in Horonai, Hokkaido (幌内) | 098-1821 |
| Postal/ZIP Codes in Kamihoronai, Hokkaido (上幌内) | 098-1708 |
| Postal/ZIP Codes in Kamiomu, Hokkaido (上雄武) | 098-1707 |
| Postal/ZIP Codes in Kamisawaki, Hokkaido (上沢木) | 098-1704 |
| Postal/ZIP Codes in Kitahoronai, Hokkaido (北幌内) | 098-1821 |
| Postal/ZIP Codes in Kitaomu, Hokkaido (北雄武) | 098-1701 |
| Postal/ZIP Codes in Minamiomu, Hokkaido (南雄武) | 098-1705 |
| Postal/ZIP Codes in Nakahoronai, Hokkaido (中幌内) | 098-1821 |
| Postal/ZIP Codes in Nakaomu, Hokkaido (中雄武) | 098-1706 |
| Postal/ZIP Codes in Omu, Hokkaido (雄武) | 098-1702 |
| Postal/ZIP Codes in Others, Hokkaido (その他) | 098-1700 |
| Postal/ZIP Codes in Sawaki, Hokkaido (沢木) | 098-1703 |