| Locality | Post Code |
|---|---|
| Kanamaru (佐渡市) | 952-0307 |
| Kasuga (佐渡市) | 952-0006 |
| Katabata (佐渡市) | 952-0023 |
| Katano (佐渡市) | 952-3542 |
| Kawaharadahommachi (佐渡市) | 952-1314 |
| Kawaharadasuwamachi (佐渡市) | 952-1315 |
| Kawasaki (佐渡市) | 952-3425 |
| Kitaebisu (佐渡市) | 952-2133 |
| Kitaikari (佐渡市) | 952-0002 |
| Kitakatabe (佐渡市) | 952-2225 |
| Kitakawachi (佐渡市) | 952-2222 |
| Kitakora (佐渡市) | 952-3207 |
| Kitamatsugasaki (佐渡市) | 952-3116 |
| Kitatanora (佐渡市) | 952-2213 |
| Kitatatsushima (佐渡市) | 952-2221 |
| Kitaushima (佐渡市) | 952-3202 |
| Kobie (佐渡市) | 952-0602 |
| Koda (佐渡市) | 952-2206 |
| Kokubunji (佐渡市) | 952-0304 |
| Konagase (佐渡市) | 952-0624 |
| Kotora (佐渡市) | 952-0606 |
| Kubota (佐渡市) | 952-1325 |
| Kujikawachi (佐渡市) | 952-3423 |
| Kurinoe (佐渡市) | 952-0202 |
| Kurohime (佐渡市) | 952-3112 |
| Maki (佐渡市) | 952-3431 |