| Locality | Postal Code |
|---|---|
| Postal/ZIP Codes in Aoyagi (国立市) | 186-0013 |
| Postal/ZIP Codes in Fujimidai (国立市) | 186-0003 |
| Postal/ZIP Codes in Higashi (国立市) | 186-0002 |
| Postal/ZIP Codes in Ishida (国立市) | 186-0014 |
| Postal/ZIP Codes in Izumi (国立市) | 186-0012 |
| Postal/ZIP Codes in Kita (国立市) | 186-0001 |
| Postal/ZIP Codes in Naka (国立市) | 186-0004 |
| Postal/ZIP Codes in Nishi (国立市) | 186-0005 |
| Postal/ZIP Codes in Others (国立市) | 186-0000 |
| Postal/ZIP Codes in Yagawa (国立市) | 186-0015 |
| Postal/ZIP Codes in Yaho (国立市) | 186-0011 |