| Locality | Postal Code |
|---|---|
| Postal/ZIP Codes in Tomioka (小樽市) | 047-0033 |
| Postal/ZIP Codes in Toyokawacho (小樽市) | 047-0043 |
| Postal/ZIP Codes in Umegaecho (小樽市) | 047-0044 |
| Postal/ZIP Codes in Wakamatsu (小樽市) | 047-0017 |
| Postal/ZIP Codes in Wakatakecho (小樽市) | 047-0001 |
| Postal/ZIP Codes in Yamadamachi (小樽市) | 047-0025 |
| Postal/ZIP Codes in Zenibako (小樽市) | 047-0261, 061-3271 |