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