12 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Lake Charles | 1 | 76,135 | 84,879 | -2.25% | 1,604 | 47 | City |
| Sulphur | 2 | 19,457 | 21,814 | -2.36% | 1,732 | 11 | City |
| Moss Bluff | 3 | 11,588 | 10,352 | 0.02% | 761 | 15 | CDP |
| Prien | 4 | 8,455 | 8,469 | 0.51% | 1,586 | 5 | CDP |
| Carlyss | 5 | 5,105 | 5,185 | 0.57% | 461 | 11 | CDP |
| Westlake | 6 | 4,469 | 4,954 | -2.12% | 1,169 | 4 | City |
| Vinton | 7 | 2,905 | 3,399 | -3.3% | 570 | 5 | Town |
| Iowa | 8 | 2,896 | 3,420 | -3.5% | 853 | 3 | Town |
| DeQuincy | 9 | 2,661 | 3,125 | -3.38% | 833 | 3 | City |
| Gillis | 10 | 911 | 587 | 1.9% | 546 | 2 | CDP |
| Hayes | 11 | 401 | 654 | -5.87% | 144 | 3 | CDP |
| Starks | 12 | 154 | 179 | -18.09% | 45 | 3 | CDP |
Lake Charles is the largest city in Calcasieu Parish, with a population of 76,135.
Starks is the smallest city in Calcasieu Parish, with a population of 154.
There are 12 cities in Calcasieu Parish, Louisiana.