Founded in 1838, Caldwell Parish is one of 64 parishes in the state of Louisiana. Historically, Caldwell Parish was formed from part of Catahoula Parish and Ouachita Parish. The city of Columbia is the parish seat. With FIPS code of 21, Caldwell Parish has a population of 9,571 and area of 541 square miles (1,401 km2).
List of all cities in Caldwell Parish, LA alphabetically
| City/Town | Postal Code | Area Code |
| Banks Springs, LA | 71418 | 318 |
| Bellview, LA | 71418 | 318 |
| Big Ridge, LA | 71418 | 318 |
| Brownville, LA | 71418 | 318 |
| Burroughs, LA | 71418 | 318 |
| Clarks, LA | 71415 | 318 |
| Columbia, LA | 71418 | 318 |
| Columbia Heights, LA | 71418 | 318 |
| Copenhagen, LA | 71418 | 318 |
| Duty Ferry, LA | 71418 | 318 |
| Eastside, LA | 71418 | 318 |
| Grayson, LA | 71435 | 318 |
| Hearn Island, LA | 71418 | 318 |
| Hebert, LA | 71418 | 318 |
| Kelly, LA | 71441 | 318 |
| Longlake, LA | 71418 | 318 |
| Riverton, LA | 71418 | 318 |
| Vixen, LA | 71418 | 318 |