| Locality | Postal Code |
|---|---|
| Postal/ZIP Codes in Yokawacho Minagidai (三木市) | 673-1117 |
| Postal/ZIP Codes in Yokawacho Mizukami (三木市) | 673-1244 |
| Postal/ZIP Codes in Yokawacho Nagatani (三木市) | 673-1127 |
| Postal/ZIP Codes in Yokawacho Nishioku (三木市) | 673-1122 |
| Postal/ZIP Codes in Yokawacho Nitta (三木市) | 673-1101 |
| Postal/ZIP Codes in Yokawacho Ohata (三木市) | 673-1116 |
| Postal/ZIP Codes in Yokawacho Okudani (三木市) | 673-1242 |
| Postal/ZIP Codes in Yokawacho Oso (三木市) | 673-1115 |
| Postal/ZIP Codes in Yokawacho Taya (三木市) | 673-1125 |
| Postal/ZIP Codes in Yokawacho Tomioka (三木市) | 673-1102 |
| Postal/ZIP Codes in Yokawacho Toyoka (三木市) | 673-1243 |
| Postal/ZIP Codes in Yokawacho Uematsu (三木市) | 673-1126 |
| Postal/ZIP Codes in Yokawacho Watase (三木市) | 673-1129 |
| Postal/ZIP Codes in Yokawacho Yamanoe (三木市) | 673-1128 |
| Postal/ZIP Codes in Yokawacho Yoneda (三木市) | 673-1121 |
| Postal/ZIP Codes in Yokawacho Yudani (三木市) | 673-1123 |
| Postal/ZIP Codes in Yoroki (三木市) | 673-0422 |
| Postal/ZIP Codes in Funaicho (三木市) | 673-0416 |