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