| Locality | Post Code |
|---|---|
| Alto, Richland | 71269 |
| Archibald, Richland | 71218 |
| Bee Bayou, Richland | 71269 |
| Crew Lake, Richland | 71269 |
| Dehlco, Richland | 71269 |
| Delhi, Richland | 71232 |
| Dunn, Richland | 71232 |
| Epps, Richland | 71237 |
| Girard, Richland | 71269 |
| Holly Ridge, Richland | 71269 |
| Jonesburg, Richland | 71269 |
| Mangham, Richland | 71259 |
| New Light, Richland | 71259 |
| Oak Ridge, Richland | 71264 |
| Rayville, Richland | 71269 |
| Start, Richland | 71279 |
| Warden, Richland | 71232 |
| Waverly, Richland | 71232 |