4 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Bogalusa | 1 | 10,157 | 10,621 | -0.91% | 1,069 | 10 | City |
| Franklinton | 2 | 3,543 | 3,637 | -0.53% | 811 | 4 | Town |
| Varnado | 3 | 318 | 325 | -0.31% | 375 | 1 | Village |
| Angie | 4 | 247 | 256 | -0.8% | 161 | 2 | Village |
Bogalusa is the largest city in Washington Parish, with a population of 10,157.
Angie is the smallest city in Washington Parish, with a population of 247.
There are 4 cities in Washington Parish, Louisiana.