| All postal codes in Arumeru |
| Akheri, Arumeru |
| Kikatiti, Arumeru |
| Kikwe, Arumeru |
| King'ori, Arumeru |
| Leguruki, Arumeru |
| Maji ya chai, Arumeru |
| Makiba, Arumeru |
| Maroroni, Arumeru |
| Mbuguni, Arumeru |
| Ngarenanyuki, Arumeru |
| Nkoanrua, Arumeru |
| Nkoaranga, Arumeru |
| Nkoarisambu, Arumeru |
| Poli, Arumeru |
| Seela Sing'isi, Arumeru |
| Songoro, Arumeru |
| Usariver, Arumeru |