| Locality | Postal Code |
|---|---|
| Postal/ZIP Codes in Yamada (川越市) | 350-0822 |
| Postal/ZIP Codes in Yamashiro (川越市) | 350-1169 |
| Postal/ZIP Codes in Yanaka (川越市) | 350-0836 |
| Postal/ZIP Codes in Yatsushima (川越市) | 350-0003 |
| Postal/ZIP Codes in Yoshida (川越市) | 350-0807 |
| Postal/ZIP Codes in Yoshidashimmachi (川越市) | 350-0808 |
| Postal/ZIP Codes in Yoshinodai (川越市) | 350-0833 |
| Postal/ZIP Codes in Yotsuyadai (川越市) | 350-1163 |