13 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 70570 | Opelousas | 37,188 |
| 70512 | Arnaudville | 10,703 |
| 70584 | Sunset | 6,865 |
| 70577 | Port Barre | 3,808 |
| 70589 | Washington | 3,138 |
| 71353 | Melville | 1,609 |
| 70750 | Krotz Springs | 1,108 |
| 70551 | Leonville | 1,030 |
| 71358 | Palmetto | 1,006 |
| 70541 | Grand Coteau | 885 |
| 71356 | Morrow | 585 |
| 70550 | Lawtell | 38 |
| 71345 | Lebeau | 35 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 13 ZCTAs in St. Landry Parish, Louisiana (US Census).