| Locality | Postal Code |
|---|---|
| Postal/ZIP Codes in Samuraihamacho (久慈市) | 028-7801 |
| Postal/ZIP Codes in Sawasato (久慈市) | 028-0035 |
| Postal/ZIP Codes in Shinnakanohashi (久慈市) | 028-0023 |
| Postal/ZIP Codes in Tako (久慈市) | 028-0053 |
| Postal/ZIP Codes in Tatsumicho (久慈市) | 028-0055 |
| Postal/ZIP Codes in Tayacho (久慈市) | 028-0022 |
| Postal/ZIP Codes in Tenjindo (久慈市) | 028-0031 |
| Postal/ZIP Codes in Terasato (久慈市) | 028-0032 |
| Postal/ZIP Codes in Ubecho (久慈市) | 028-8111 |
| Postal/ZIP Codes in Yamagatacho Heromachi (久慈市) | 028-8601 |
| Postal/ZIP Codes in Yamagatacho Hinosawa (久慈市) | 028-8604 |
| Postal/ZIP Codes in Yamagatacho Kawai (久慈市) | 028-8602 |
| Postal/ZIP Codes in Yamagatacho Nikarube (久慈市) | 028-8603 |
| Postal/ZIP Codes in Yamagatacho Oguni (久慈市) | 028-8712 |
| Postal/ZIP Codes in Yamagatacho Rainai (久慈市) | 028-8605 |
| Postal/ZIP Codes in Yamagatacho Shimohata (久慈市) | 028-8713 |
| Postal/ZIP Codes in Yamagatacho Tsunagi (久慈市) | 028-8711 |
| Postal/ZIP Codes in Yamanecho (久慈市) | 028-8521 |
| Postal/ZIP Codes in Yokacho (久慈市) | 028-0064 |