| Locality | Postal Code |
|---|---|
| Araishinden (白岡市) | 349-0202 |
| Hikobee (白岡市) | 349-0224 |
| Kaminoda (白岡市) | 349-0221 |
| Koguki (白岡市) | 349-0217 |
| Nishi (白岡市) | 349-0205 |
| Okaizumi (白岡市) | 349-0226 |
| Otaarai (白岡市) | 349-0225 |
| Others (白岡市) | 349-0200 |
| Sanagaya (白岡市) | 349-0216 |
| Sendano (白岡市) | 349-0215 |
| Shibayama (白岡市) | 349-0201 |
| Shimonoda (白岡市) | 349-0223 |
| Shimoosaki (白岡市) | 349-0203 |
| Shinozu (白岡市) | 349-0204 |
| Shinshiraoka (白岡市) | 349-0212 |
| Shiraoka (白岡市) | 349-0218 |
| Shiraokahigashi (白岡市) | 349-0219 |
| Takaiwa (白岡市) | 349-0213 |
| Teratsuka (白岡市) | 349-0214 |
| Tsumetagaya (白岡市) | 349-0222 |
| Yagyu (白岡市) | 349-0211 |