| Locality | Post Code |
|---|---|
| Kamishozenji (上越市) | 943-0811 |
| Kamitomigawa (上越市) | 943-0126 |
| Kamitsunago (上越市) | 949-1741 |
| Kamiyoshino (上越市) | 942-0241 |
| Kamiyudani (上越市) | 943-0839 |
| Kamizone (上越市) | 943-0424 |
| Kamojima (上越市) | 943-0153 |
| Kasuga (上越市) | 943-0809 |
| Kasugano (上越市) | 943-0803 |
| Kasugashinden (上越市) | 942-0061 |
| Kasugayamamachi (上越市) | 943-0807 |
| Kawabata (上越市) | 942-0038 |
| Kawaramachi (上越市) | 942-0065 |
| Kida (上越市) | 943-0805 |
| Kidashinden (上越市) | 943-0806 |
| Kijima (上越市) | 943-0855 |
| Kirihara (上越市) | 943-0183 |
| Amanoharashinden (上越市) | 943-0139 |