6 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Newellton | 1 | 812 | 899 | -1.93% | 1,070 | 1 | Town |
| Newellton | 2 | 812 | 890 | -1.93% | 1,070 | 1 | Town |
| St. Joseph | 3 | 766 | 834 | -1.54% | 861 | 1 | Town |
| St. Joseph | 4 | 766 | 826 | -1.54% | 861 | 1 | Town |
| Waterproof | 5 | 499 | 554 | -1.96% | 716 | 1 | Town |
| Waterproof | 6 | 499 | 549 | -1.96% | 716 | 1 | Town |
Newellton is the largest city in Tensas Parish, with a population of 812.
Waterproof is the smallest city in Tensas Parish, with a population of 499.
There are 6 cities in Tensas Parish, Louisiana.