| Ortschaft | Postleitzahl |
|---|---|
| Aota (石岡市) | 315-0148 |
| Aragane (石岡市) | 315-0021 |
| Asahidai (石岡市) | 315-0038 |
| Baraki (石岡市) | 315-0042 |
| Busshoji (石岡市) | 315-0145 |
| Fuchu (石岡市) | 315-0013 |
| Goishizawa (石岡市) | 315-0010 |
| Hachikendai (石岡市) | 315-0024 |
| Handa (石岡市) | 315-0133 |
| Hannoki (石岡市) | 315-0028 |
| Hebara (石岡市) | 315-0112 |
| Higashifuchu (石岡市) | 315-0023 |
| Higashiishioka (石岡市) | 315-0037 |
| Higashinarui (石岡市) | 315-0122 |
| Higashiohashi (石岡市) | 315-0031 |
| Higashitanaka (石岡市) | 315-0034 |
| Hosoya (石岡市) | 315-0152 |
| Ikenodai (石岡市) | 315-0030 |
| Iseki (石岡市) | 315-0047 |
| Ishikawa (石岡市) | 315-0046 |
| Ishioka (石岡市) | 315-0001 |
| Izumicho (石岡市) | 315-0025 |
| Kaiji (石岡市) | 315-0015 |
| Kakioka (石岡市) | 315-0116 |
| Kamiaoyagi (石岡市) | 315-0154 |
| Kamibayashi (石岡市) | 315-0138 |