| Place | Postal Code |
|---|---|
| Kalindilo, Kwa Mutonga/Kithumula | 90200 |
| Kasaini, Kwa Mutonga/Kithumula | 90200 |
| Kithumula, Kwa Mutonga/Kithumula | 90200 |
| Kwa-Mulungu, Kwa Mutonga/Kithumula | 90200 |
| Mutonga, Kwa Mutonga/Kithumula | 90200 |
| Syokithumbi, Kwa Mutonga/Kithumula | 90200 |
| Postal Codes in Kitui West | |
|---|---|
| Kauwi, Kitui West | |
| Kwa Mutonga/Kithumula, Kitui West | |
| Matinyani, Kitui West | |
| Mutonguni, Kitui West | |