| Locality | Postal Code |
|---|---|
| Postal/ZIP Codes in Sankyomachi (酒田市) | 998-0838 |
| Postal/ZIP Codes in Sannomiya (酒田市) | 999-6723 |
| Postal/ZIP Codes in Seki (酒田市) | 998-0805 |
| Postal/ZIP Codes in Sengokucho (酒田市) | 998-0843 |
| Postal/ZIP Codes in Sennichicho (酒田市) | 998-0014 |
| Postal/ZIP Codes in Setsuda (酒田市) | 999-8246 |
| Postal/ZIP Codes in Shimbashi (酒田市) | 998-0864 |
| Postal/ZIP Codes in Shimmachi (酒田市) | 999-6837 |
| Postal/ZIP Codes in Shimoaosawa (酒田市) | 999-8213 |
| Postal/ZIP Codes in Shimokurokawa (酒田市) | 999-8205 |
| Postal/ZIP Codes in Shimomochiyama (酒田市) | 999-6846 |
| Postal/ZIP Codes in Shimoyasucho (酒田市) | 998-0012 |
| Postal/ZIP Codes in Shinde (酒田市) | 999-8204 |
| Postal/ZIP Codes in Shingakujisawa (酒田市) | 999-6823 |
| Postal/ZIP Codes in Shinyashiki (酒田市) | 999-6832 |
| Postal/ZIP Codes in Shitase (酒田市) | 998-0837 |
| Postal/ZIP Codes in Sokojisawa (酒田市) | 999-6831 |
| Postal/ZIP Codes in Soneda (酒田市) | 999-8155 |