| Place | Post Code |
|---|---|
| その他 (Others, Ibaraki) | 311-3100 |
| 小堤 (Ozutsumi, Ibaraki) | 311-3131 |
| 桜の郷 (Sakuranosato, Ibaraki) | 311-3117 |
| 下雨ケ谷 (Shimoamagai, Ibaraki) | 311-3144 |
| 下土師 (Shimohaji, Ibaraki) | 311-3155 |
| 下飯沼 (Shimoiinuma, Ibaraki) | 311-3154 |
| 下石崎 (Shimoishizaki, Ibaraki) | 311-3125 |
| 蕎麦原 (Sobahara, Ibaraki) | 311-3105 |
| 常井 (Tokoi, Ibaraki) | 311-3112 |
| 鳥羽田 (Torihata, Ibaraki) | 311-3142 |
| 馬渡 (Umawatari, Ibaraki) | 311-3111 |
| 若宮 (Wakamiya, Ibaraki) | 311-3123 |
| 谷田部 (Yatabe, Ibaraki) | 311-3121 |
| Postal Codes in Higashiibaraki | |
|---|---|
| Ibaraki (茨城町) | |
| Oarai (大洗町) | |
| Shirosato (城里町) | |