| Locality | Postal Code |
|---|---|
| Postal/ZIP Codes in Suginami (石岡市) | 315-0027 |
| Postal/ZIP Codes in Suginoi (石岡市) | 315-0026 |
| Postal/ZIP Codes in Tajima (石岡市) | 315-0041 |
| Postal/ZIP Codes in Takahama (石岡市) | 315-0045 |
| Postal/ZIP Codes in Tokodai (石岡市) | 315-0033 |
| Postal/ZIP Codes in Tsuji (石岡市) | 315-0147 |
| Postal/ZIP Codes in Tsukioka (石岡市) | 315-0141 |
| Postal/ZIP Codes in Ujie (石岡市) | 315-0162 |
| Postal/ZIP Codes in Urasu (石岡市) | 315-0115 |
| Postal/ZIP Codes in Uwaso (石岡市) | 315-0157 |
| Postal/ZIP Codes in Wakamatsu (石岡市) | 315-0018 |
| Postal/ZIP Codes in Wakamiya (石岡市) | 315-0017 |
| Postal/ZIP Codes in Yamazaki (石岡市) | 315-0125 |
| Postal/ZIP Codes in Yamukaicho (石岡市) | 315-0003 |
| Postal/ZIP Codes in Yoshiu (石岡市) | 315-0156 |
| Postal/ZIP Codes in Yuzuri (石岡市) | 315-0142 |