9 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Lafayette | 1 | 122,487 | 121,450 | 0.17% | 2,187 | 56 | City |
| Youngsville | 2 | 19,788 | 16,036 | 3.94% | 1,577 | 13 | City |
| Broussard | 3 | 15,754 | 13,542 | 2.89% | 869 | 18 | City |
| Carencro | 4 | 13,760 | 9,372 | 6.81% | 1,752 | 8 | City |
| Scott | 5 | 9,790 | 8,180 | 3.4% | 834 | 12 | City |
| Ossun | 6 | 2,645 | 2,238 | 1.26% | 779 | 3 | CDP |
| Milton | 7 | 2,316 | 2,068 | -2.03% | 498 | 5 | CDP |
| Henderson | 8 | 1,605 | 1,605 | 0% | 537 | 3 | Town |
| Duson | 9 | 1,340 | 1,344 | -0.07% | 445 | 3 | Town |
Lafayette is the largest city in Lafayette Parish, with a population of 122,487.
Duson is the smallest city in Lafayette Parish, with a population of 1,340.
There are 9 cities in Lafayette Parish, Louisiana.