| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Jonesville | 1 | 1,493 | 1,716 | -2.48% | 778 | 2 | Town |
| Sicily Island | 2 | 322 | 365 | -2.42% | 561 | 1 | Village |
| Harrisonburg | 3 | 257 | 282 | -1.53% | 265 | 1 | Village |
Jonesville is the largest city in Catahoula Parish, with a population of 1,493.
Harrisonburg is the smallest city in Catahoula Parish, with a population of 257.
There are 3 cities in Catahoula Parish, Louisiana.