| Place | Postal Code |
|---|---|
| Postal/ZIP Codes in Dairoku, Chiba (大六) | 299-1909 |
| Postal/ZIP Codes in Ezuki, Chiba (江月) | 299-1907 |
| Postal/ZIP Codes in Hota, Chiba (保田) | 299-1902 |
| Postal/ZIP Codes in Ichiibara, Chiba (市井原) | 299-1905 |
| Postal/ZIP Codes in Iwaifukuro, Chiba (岩井袋) | 299-2116 |
| Postal/ZIP Codes in Kamisakuma, Chiba (上佐久間) | 299-2113 |
| Postal/ZIP Codes in Katsuyama, Chiba (勝山) | 299-2117 |
| Postal/ZIP Codes in Kobota, Chiba (小保田) | 299-1904 |
| Postal/ZIP Codes in Motona, Chiba (元名) | 299-1901 |
| Postal/ZIP Codes in Nakasakuma, Chiba (中佐久間) | 299-2114 |
| Postal/ZIP Codes in Okatabira, Chiba (大帷子) | 299-1903 |
| Postal/ZIP Codes in Okuyama, Chiba (奥山) | 299-2112 |
| Postal/ZIP Codes in Okuzure, Chiba (大崩) | 299-2111 |
| Postal/ZIP Codes in Others, Chiba (その他) | 299-2100 |
| Postal/ZIP Codes in Ryushima, Chiba (竜島) | 299-2118 |
| Postal/ZIP Codes in Shimosakuma, Chiba (下佐久間) | 299-2115 |
| Postal/ZIP Codes in Yokone, Chiba (横根) | 299-1906 |
| Postal/ZIP Codes in Yoshihama, Chiba (吉浜) | 299-1908 |
| Postal Codes in Awa | |
|---|---|
| Postal/ZIP Codes in Kyonan (鋸南町) | |