| Place | Post Code |
|---|---|
| Kairungu, Kiomo/Kyethani | 90400 |
| Kavuvwani, Kiomo/Kyethani | 90400 |
| Kiomo, Kiomo/Kyethani | 90400 |
| Kyethani, Kiomo/Kyethani | 90400 |
| All postal codes in Mwingi Central | |
|---|---|
| Central Mwingi, Mwingi Central | |
| Kiomo/Kyethani, Mwingi Central | |
| Kivou, Mwingi Central | |
| Mui, Mwingi Central | |
| Nguni, Mwingi Central | |
| Nuu, Mwingi Central | |
| Waita, Mwingi Central | |