| Place | Postal Code |
|---|---|
| Gatitu, Kiganjo | 00900 |
| Kiamuoria, Kiganjo | 00900 |
| Kiganjo, Kiganjo | 00900 |
| Mundoro, Kiganjo | 00200 |
| Ndundu, Kiganjo | 00900 |
| Postal Codes in Gatundu South | |
|---|---|
| Kiamwangi, Gatundu South | |
| Kiganjo, Gatundu South | |
| Ndarugu, Gatundu South | |
| Ngenda, Gatundu South | |