| Place | Post Code |
|---|---|
| Gaciongo, Tharaka | 90400 |
| Gakombe, Tharaka | 90400 |
| Gatoroni, Tharaka | 90400 |
| Kamaindi, Tharaka | 90400 |
| Kanthungu, Tharaka | 90400 |
| Kanyengya, Tharaka | 90400 |
| Kiseuni, Tharaka | 90400 |
| All postal codes in Mwingi North | |
|---|---|
| Kyuso, Mwingi North | |
| Mumoni, Mwingi North | |
| Ngomeni, Mwingi North | |
| Tharaka, Mwingi North | |
| Tseikuru, Mwingi North | |