| Locality | Post Code |
|---|---|
| Foxton, Horowhenua | 4473, 4477, 4814, 4815, 4891, … |
| Hokio Beach, Horowhenua | 5571 |
| Koputaroa, Horowhenua | 5571, 5575 |
| Levin, Horowhenua | 5510, 5570, 5571, 5572, 5574, … |
| Manakau, Horowhenua | 5570, 5573, 5583 |
| Moutoa, Horowhenua | 4893, 5572 |
| Muhunoa East, Horowhenua | 5570 |
| Ohau, Horowhenua | 5570 |
| Opiki, Horowhenua | 4474 |
| Palmerston North, Horowhenua | 4474 |
| Shannon, Horowhenua | 4474, 4821 |
| Tiakitahuna, Horowhenua | 4474 |
| Waikawa Beach, Horowhenua | 5573 |
| Manawatu-Wanganui Postal Codes | |
|---|---|
| Wanganui | Tararua |
| Ruapehu | Rangitikei |
| Palmerston North | Manawatu |
| Horowhenua | |