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