| Place | Postal Code |
|---|---|
| Postal/ZIP Codes in Gikandu, Mbiri | 10200 |
| Postal/ZIP Codes in Githuri, Mbiri | 10200 |
| Postal/ZIP Codes in Kambirwa, Mbiri | 10200 |
| Postal/ZIP Codes in Maragi, Mbiri | 10200 |
| Postal/ZIP Codes in Mbiri, Mbiri | 10233 |
| Postal/ZIP Codes in Mirira, Mbiri | 10200 |
| Postal/ZIP Codes in Muchungucha, Mbiri | 10200 |