| Locality | Postal Code |
|---|---|
| Futatsuya (十日町市) | 948-0034 |
| Gakkocho (十日町市) | 948-0022 |
| Gejo (十日町市) | 949-8603 |
| Genta (十日町市) | 949-8542 |
| Gimiyo (十日町市) | 942-1536 |
| Gokenshinden (十日町市) | 948-0001 |
| Hachimandacho (十日町市) | 948-0071 |
| Hakka (十日町市) | 948-0033 |
| Haramachi (十日町市) | 949-8446 |
| Higashishimogumi (十日町市) | 949-8601 |
| Higashitajiri (十日町市) | 949-8425 |
| Higashitazawa (十日町市) | 949-8424 |
| Himizo (十日町市) | 949-8408 |
| Hokizawa (十日町市) | 949-8417 |
| Honcho (十日町市) | 948-0003 |
| Honchogochome (十日町市) | 948-0081 |
| Honchohigashiitchome (十日町市) | 948-0083 |
| Honchoitchomekami (十日町市) | 948-0083 |
| Honchoitchomeshimo (十日町市) | 948-0083 |
| Honchonichome (十日町市) | 948-0082 |
| Honchonishiitchome (十日町市) | 948-0083 |
| Honchorokunoitchome (十日町市) | 948-0003 |
| Honchorokunonichome (十日町市) | 948-0003 |
| Honchorokunosanchome (十日町市) | 948-0003 |
| Honchosanchome (十日町市) | 948-0082 |
| Honchoyonchome (十日町市) | 948-0082 |