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