| Locality | Post Code |
|---|---|
| Armistead, Red River | 71019 |
| Coushatta, Red River | 71019 |
| East Point, Red River | 71019 |
| Edgefield, Red River | 71019 |
| Gahagan, Red River | 71019 |
| Hall Summit, Red River | 71034 |
| Hanna, Red River | 71019 |
| Harmon, Red River | 71019 |
| Martin, Red River | 71019 |