| Locality | Post Code |
|---|---|
| Samizu (柏崎市) | 945-1115 |
| Sanwacho (柏崎市) | 945-0034 |
| Satogaikeshinden (柏崎市) | 945-1354 |
| Sekimachi (柏崎市) | 945-0832 |
| Shiiya (柏崎市) | 945-0401 |
| Shimbashi (柏崎市) | 945-0056 |
| Shimizutani (柏崎市) | 945-1246 |
| Shimogata (柏崎市) | 945-1104 |
| Shimooshinden (柏崎市) | 945-0103 |
| Shimotajiri (柏崎市) | 945-1345 |
| Shinakasaka (柏崎市) | 945-0845 |
| Shindenhata (柏崎市) | 945-0031 |
| Shindo (柏崎市) | 945-1122 |
| Shinhanacho (柏崎市) | 945-0062 |
| Sochi (柏崎市) | 945-0214 |
| Sochishinden (柏崎市) | 945-0217 |
| Suwacho (柏崎市) | 945-0063 |
| Takaramachi (柏崎市) | 945-0817 |
| Takayanagicho Ishiguro (柏崎市) | 945-1515 |
| Takayanagicho Kadoide (柏崎市) | 945-1513 |
| Takayanagicho Oginoshima (柏崎市) | 945-1512 |
| Takayanagicho Okada (柏崎市) | 945-1501 |
| Takayanagicho Okanomachi (柏崎市) | 945-1502 |
| Takayanagicho Takao (柏崎市) | 945-1505 |
| Takayanagicho Tashiro (柏崎市) | 945-1514 |
| Takayanagicho Tochigahara (柏崎市) | 945-1504 |