| Place | Post Code |
|---|---|
| Kaimu, Mutonguni | 90200 |
| Kakeani, Mutonguni | 90200 |
| Kakumuti, Mutonguni | 90200 |
| Kangii, Mutonguni | 90200 |
| Mithini, Mutonguni | 90200 |
| Musengo, Mutonguni | 90200 |
| Yalatani, Mutonguni | 90200 |
| All postal codes in Kitui West | |
|---|---|
| Kauwi, Kitui West | |
| Kwa Mutonga/Kithumula, Kitui West | |
| Matinyani, Kitui West | |
| Mutonguni, Kitui West | |