13 ZIP Codes
| Zip Code | City | Population ↓ |
|---|---|---|
| 70570 | Opelousas | 37,565 |
| 70512 | Arnaudville | 10,740 |
| 70584 | Sunset | 7,481 |
| 70577 | Port Barre | 3,939 |
| 70589 | Washington | 2,875 |
| 71353 | Melville | 1,399 |
| 70750 | Krotz Springs | 1,117 |
| 71358 | Palmetto | 867 |
| 70541 | Grand Coteau | 858 |
| 71356 | Morrow | 596 |
| 70551 | Leonville | 570 |
| 70550 | Lawtell | 34 |
| 71345 | Lebeau | 34 |
The data shown reflect ZCTAs from the US Census. As of 2025, there are 13 ZCTAs in St. Landry Parish, Louisiana (US Census).