| Place | Postal Code |
|---|---|
| Postal/ZIP Codes in Tazawacho, Hokkaido (田沢町) | 043-0023 |
| Postal/ZIP Codes in Todogawacho, Hokkaido (とど川町) | 043-0066 |
| Postal/ZIP Codes in Tomaricho, Hokkaido (泊町) | 043-0025 |
| Postal/ZIP Codes in Toyokawacho, Hokkaido (豊川町) | 043-0033 |
| Postal/ZIP Codes in Tsubanacho, Hokkaido (津花町) | 043-0051 |
| Postal/ZIP Codes in Ubagamicho, Hokkaido (姥神町) | 043-0041 |
| Postal/ZIP Codes in Uenocho, Hokkaido (上野町) | 043-0042 |
| Postal/ZIP Codes in Uguikawacho, Hokkaido (鰔川町) | 043-0012 |
| Postal/ZIP Codes in Yanagizakicho, Hokkaido (柳崎町) | 043-0021 |