Founded in 1868, Richland Parish is one of 64 parishes in the state of Louisiana. Historically, Richland Parish was formed from parts of Carroll Parish, Franklin Parish, Morehouse Parish and Ouachita Parish. The city of Rayville is the parish seat. With FIPS code of 83, Richland Parish has a population of 19,805 and area of 564 square miles (1,461 km2).
List of all cities in Richland Parish, LA alphabetically
| City/Town | Postal Code | Area Code |
| Alto, LA | 71269 | 318 |
| Archibald, LA | 71218 | 318 |
| Bee Bayou, LA | 71269 | 318 |
| Crew Lake, LA | 71269 | 318 |
| Dehlco, LA | 71269 | 318 |
| Delhi, LA | 71232 | 318 |
| Dunn, LA | 71232 | 318 |
| Girard, LA | 71269 | 318 |
| Holly Ridge, LA | 71269 | 318 |
| Jonesburg, LA | 71269 | 318 |
| Mangham, LA | 71259 | 318 |
| New Light, LA | 71259 | 318 |
| Rayville, LA | 71269 | 318 |
| Start, LA | 71279 | 318 |
| Warden, LA | 71232 | 318 |
| Waverly, LA | 71232 | 318 |