| Place | Post Code |
|---|---|
| Gathera, Chinga | 10100 |
| Gichiche, Chinga | 10100 |
| Gikigie, Chinga | 10100 |
| Kagongo, Chinga | 10100 |
| Kairuthi, Chinga | 10100 |
| Mucharage, Chinga | 10100 |
| Mumbuini, Chinga | 10100 |
| All postal codes in Othaya | |
|---|---|
| Chinga, Othaya | |
| Iria-Ini, Othaya | |
| Karima, Othaya | |
| Mahiga, Othaya | |