| Zip Code | City | Population ↓ |
|---|---|---|
| 70605 | Lake Charles | 40,870 |
| 70601 | Lake Charles | 32,936 |
| 70663 | Sulphur | 30,299 |
| 70607 | Lake Charles | 28,165 |
| 70611 | Lake Charles | 20,383 |
| 70615 | Lake Charles | 14,204 |
| 70665 | Sulphur | 12,405 |
| 70647 | Iowa | 11,770 |
| 70669 | Westlake | 9,640 |
| 70633 | Dequincy | 8,373 |
| 70668 | Vinton | 6,488 |
| 70661 | Starks | 1,598 |
| 70646 | Hayes | 515 |
| 70609 | Lake Charles | 473 |
| 70629 | Lake Charles | 0 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 15 ZCTAs in Calcasieu Parish, Louisiana (US Census).