| Locality | Post Code |
|---|---|
| Himezu (佐渡市) | 952-2134 |
| Hiramatsu (佐渡市) | 952-3115 |
| Hirashimizu (佐渡市) | 952-1213 |
| Ichinosawa (佐渡市) | 952-1302 |
| Iimochi (佐渡市) | 952-0213 |
| Ikaura (佐渡市) | 952-2202 |
| Inakujira (佐渡市) | 952-1643 |
| Inukamidaira (佐渡市) | 952-0614 |
| Ishida (佐渡市) | 952-1322 |
| Ishige (佐渡市) | 952-2224 |
| Ishina (佐渡市) | 952-2211 |
| Itsubo (佐渡市) | 952-0626 |
| Iwakubi (佐渡市) | 952-0857 |
| Iwayaguchi (佐渡市) | 952-2201 |
| Izumi (佐渡市) | 952-1212 |
| Jonokoshi (佐渡市) | 952-3422 |
| Kaizuka (佐渡市) | 952-1207 |
| Kajimachi (佐渡市) | 952-1323 |
| Kakinora (佐渡市) | 952-0855 |
| Kamikawamo (佐渡市) | 952-0702 |
| Kaminagaki (佐渡市) | 952-1305 |
| Kaminiibo (佐渡市) | 952-0108 |
| Kamiyabase (佐渡市) | 952-1303 |
| Kamiyokoyama (佐渡市) | 952-0024 |
| Kamotashiro (佐渡市) | 952-0028 |
| Kanaishimbo (佐渡市) | 952-1208 |