| Locality | Postal Code |
|---|---|
| Postal/ZIP Codes in Nishihoncho (十日町市) | 948-0072 |
| Postal/ZIP Codes in Nishikicho (十日町市) | 948-0053 |
| Postal/ZIP Codes in Nishitajiri (十日町市) | 949-8437 |
| Postal/ZIP Codes in Nishiurachohigashi (十日町市) | 948-0074 |
| Postal/ZIP Codes in Nishiurachonishi (十日町市) | 948-0074 |
| Postal/ZIP Codes in Nita (十日町市) | 948-0302 |
| Postal/ZIP Codes in Noguchi (十日町市) | 948-0301 |
| Postal/ZIP Codes in Nonaka (十日町市) | 949-8545 |
| Postal/ZIP Codes in Nyoraiji (十日町市) | 949-8404 |
| Postal/ZIP Codes in Ogurosawa (十日町市) | 949-8521 |
| Postal/ZIP Codes in Oike (十日町市) | 948-0018 |
| Postal/ZIP Codes in Oishi (十日町市) | 949-8555 |
| Postal/ZIP Codes in Ojirakura (十日町市) | 948-0305 |
| Postal/ZIP Codes in Okidate (十日町市) | 948-0133 |
| Postal/ZIP Codes in Okura (十日町市) | 948-0211 |
| Postal/ZIP Codes in Onoshima (十日町市) | 942-1505 |
| Postal/ZIP Codes in Osaki (十日町市) | 948-0008 |
| Postal/ZIP Codes in Otajima (十日町市) | 949-8524 |