| Locality | Postal Code |
|---|---|
| Postal/ZIP Codes in Miwanoe (吉川市) | 342-0027 |
| Postal/ZIP Codes in Nabekoji (吉川市) | 342-0004 |
| Postal/ZIP Codes in Nakagawadai (吉川市) | 342-0047 |
| Postal/ZIP Codes in Nakai (吉川市) | 342-0015 |
| Postal/ZIP Codes in Nakajima (吉川市) | 342-0031 |
| Postal/ZIP Codes in Nakano (吉川市) | 342-0042 |
| Postal/ZIP Codes in Nakazone (吉川市) | 342-0033 |
| Postal/ZIP Codes in Others (吉川市) | 342-0000 |
| Postal/ZIP Codes in Sakaecho (吉川市) | 342-0050 |
| Postal/ZIP Codes in Saranuma (吉川市) | 342-0023 |
| Postal/ZIP Codes in Seki (吉川市) | 342-0053 |
| Postal/ZIP Codes in Sekishinden (吉川市) | 342-0014 |
| Postal/ZIP Codes in Shimochikawa (吉川市) | 342-0002 |
| Postal/ZIP Codes in Shinei (吉川市) | 342-0059 |
| Postal/ZIP Codes in Shishimizuka (吉川市) | 342-0021 |
| Postal/ZIP Codes in Suka (吉川市) | 342-0057 |
| Postal/ZIP Codes in Takadomi (吉川市) | 342-0036 |
| Postal/ZIP Codes in Takahisa (吉川市) | 342-0035 |
| Postal/ZIP Codes in Tomishinden (吉川市) | 342-0037 |
| Postal/ZIP Codes in Yoshikawa (吉川市) | 342-0055 |
| Postal/ZIP Codes in Yoshikawadanchi (吉川市) | 342-0054 |
| Postal/ZIP Codes in Yoshiya (吉川市) | 342-0013 |