| Place | Post Code |
|---|---|
| Ikongo, Mumoni | 90400 |
| Kakuyu, Mumoni | 90400 |
| Kaliwa, Mumoni | 90400 |
| Kamathitu, Mumoni | 90400 |
| Konyu, Mumoni | 90400 |
| Kyandali, Mumoni | 90400 |
| Mbarani, Mumoni | 90400 |
| Mukonga, Mumoni | 90400 |
| Musosya, Mumoni | 90400 |
| Mutanda, Mumoni | 90400 |
| Tyaa, Mumoni | 90400 |
| Wangutu, Mumoni | 90400 |
| All postal codes in Mwingi North | |
|---|---|
| Kyuso, Mwingi North | |
| Mumoni, Mwingi North | |
| Ngomeni, Mwingi North | |
| Tharaka, Mwingi North | |
| Tseikuru, Mwingi North | |