| Locality | Post Code |
|---|---|
| Oshidashi (小諸市) | 384-0037 |
| Ote (小諸市) | 384-0031 |
| Others (小諸市) | 384-0000 |
| Otome (小諸市) | 384-0004 |
| Otsu (小諸市) | 384-0802 |
| Rokku (小諸市) | 384-0027 |
| Ryojin (小諸市) | 384-0035 |
| Sakanoe (小諸市) | 384-0018 |
| Shibota (小諸市) | 384-0046 |
| Shigenoko (小諸市) | 384-0809 |
| Shimmachi (小諸市) | 384-0034 |
| Shinonome (小諸市) | 384-0023 |
| Shiono (小諸市) | 384-0806 |
| Suwayama (小諸市) | 384-0082 |
| Takibara (小諸市) | 384-0045 |
| Tamachi (小諸市) | 384-0028 |
| Tei (小諸市) | 384-0804 |
| Tochigi (小諸市) | 384-0038 |
| Tokikubo (小諸市) | 384-0072 |
| Tsurumaki (小諸市) | 384-0007 |
| Uenodaira (小諸市) | 384-0075 |
| Ushirodaira (小諸市) | 384-0042 |
| Wada (小諸市) | 384-0093 |
| Yachihara (小諸市) | 384-0095 |
| Yamaura (小諸市) | 384-0807 |
| Yoramachi (小諸市) | 384-0006 |