| Locality | Post Code |
|---|---|
| Shimoebata (胎内市) | 959-2809 |
| Shimojozuka (胎内市) | 959-2677 |
| Shimotakada (胎内市) | 959-2707 |
| Shimotate (胎内市) | 959-2805 |
| Shindate (胎内市) | 959-2666 |
| Shineicho (胎内市) | 959-2632 |
| Shinwacho (胎内市) | 959-2642 |
| Shiozawa (胎内市) | 959-2804 |
| Shiozu (胎内市) | 959-2669 |
| Sugeta (胎内市) | 959-2603 |
| Sumaki (胎内市) | 959-2817 |
| Sumiyoshicho (胎内市) | 959-2648 |
| Takabatake (胎内市) | 959-2703 |
| Takahashi (胎内市) | 959-2715 |
| Takano (胎内市) | 959-2618 |
| Takanomurashinden (胎内市) | 959-2617 |
| Takanosu (胎内市) | 959-2662 |
| Takeshima (胎内市) | 959-2722 |
| Toboku (胎内市) | 959-2808 |
| Tomioka (胎内市) | 959-2608 |
| Torada (胎内市) | 959-2673 |
| Tsuboana (胎内市) | 959-2821 |
| Tsuchizukuri (胎内市) | 959-2616 |
| Tsuiji (胎内市) | 959-2712 |
| Tsuijishin (胎内市) | 959-2713 |
| Tsutsujigaoka (胎内市) | 959-2635 |