12 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Lake Charles | 1 | 80,225 | 84,885 | -1.15% | 1,690 | 47 | City |
| Sulphur | 2 | 20,260 | 21,819 | -1.52% | 1,803 | 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 | 4,680 | 4,954 | -1.16% | 1,224 | 4 | City |
| Iowa | 7 | 3,082 | 3,420 | -2.16% | 908 | 3 | Town |
| Vinton | 8 | 3,035 | 3,400 | -2.35% | 595 | 5 | Town |
| DeQuincy | 9 | 2,808 | 3,126 | -2.23% | 879 | 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 80,225.
Starks is the smallest city in Calcasieu Parish, with a population of 154.
There are 12 cities in Calcasieu Parish, Louisiana.