4 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Breaux Bridge | 1 | 7,514 | 7,479 | 0.09% | 974 | 7.72 | City |
| St. Martinville | 2 | 5,155 | 5,404 | -0.96% | 1,627 | 3.17 | City |
| Cade | 3 | 2,019 | 2,053 | 0.95% | 301 | 6.72 | CDP |
| Cecilia | 4 | 1,224 | 1,323 | -3.92% | 578 | 2.12 | CDP |
Breaux Bridge is the largest city in St. Martin Parish, with a population of 7,514.
Cecilia is the smallest city in St. Martin Parish.
There are 4 cities in St. Martin Parish, Louisiana.