3 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Jonesville | 1 | 1,523 | 1,716 | -2.5% | 793 | 2 | Town |
| Sicily Island | 2 | 325 | 365 | -2.4% | 566 | 1 | Village |
| Harrisonburg | 3 | 257 | 279 | -1.91% | 265 | 1 | Village |
Jonesville is the largest city in Catahoula Parish, with a population of 1,523.
Harrisonburg is the smallest city in Catahoula Parish, with a population of 257.
There are 3 cities in Catahoula Parish, Louisiana.