7 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Lafayette | 1 | 122,695 | 121,450 | 0.17% | 2,174 | 56 | City |
| Youngsville | 2 | 20,539 | 16,036 | 3.8% | 1,637 | 13 | City |
| Broussard | 3 | 16,197 | 13,542 | 2.81% | 892 | 18 | City |
| Carencro | 4 | 14,638 | 9,372 | 6.38% | 1,863 | 8 | City |
| Scott | 5 | 10,112 | 8,180 | 3.29% | 862 | 12 | City |
| Henderson | 6 | 1,605 | 1,605 | 0% | 537 | 3 | Town |
| Duson | 7 | 1,339 | 1,344 | -0.07% | 445 | 3 | Town |
Lafayette is the largest city in Lafayette Parish, with a population of 122,695.
Duson is the smallest city in Lafayette Parish, with a population of 1,339.
There are 7 cities in Lafayette Parish, Louisiana.