| Place | Postal Code |
|---|---|
| Postal/ZIP Codes in Hamada, Chiba (浜田) | 261-0025 |
| Postal/ZIP Codes in Hibino, Chiba (ひび野) | 261-0021 |
| Postal/ZIP Codes in Inagekaigan, Chiba (稲毛海岸) | 261-0005 |
| Postal/ZIP Codes in Isobe, Chiba (磯辺) | 261-0012 |
| Postal/ZIP Codes in Makuharinishi, Chiba (幕張西) | 261-0026 |
| Postal/ZIP Codes in Masago, Chiba (真砂) | 261-0011 |
| Postal/ZIP Codes in Mihama, Chiba (美浜) | 261-0022 |
| Postal/ZIP Codes in Nakase, Chiba (中瀬) | 261-0023 |
| Postal/ZIP Codes in Nakase Warudobijinesugaden, Chiba (中瀬ワールドビジネスガーデン) | 261 |
| Postal/ZIP Codes in Others, Chiba (その他) | 261-0000 |
| Postal/ZIP Codes in Saiwaicho, Chiba (幸町) | 261-0001 |
| Postal/ZIP Codes in Shimminato, Chiba (新港) | 261-0002 |
| Postal/ZIP Codes in Takahama, Chiba (高浜) | 261-0003 |
| Postal/ZIP Codes in Takasu, Chiba (高洲) | 261-0004 |
| Postal/ZIP Codes in Toyosuna, Chiba (豊砂) | 261-0024 |
| Postal/ZIP Codes in Utase, Chiba (打瀬) | 261-0013 |
| Postal/ZIP Codes in Wakaba, Chiba (若葉) | 261-0014 |