4 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Bogalusa | 1 | 10,303 | 10,620 | -0.62% | 1,084 | 10 | City |
| Franklinton | 2 | 3,580 | 3,638 | -0.33% | 819 | 4 | Town |
| Varnado | 3 | 317 | 322 | -0.31% | 373 | 1 | Village |
| Angie | 4 | 250 | 252 | -0.4% | 163 | 2 | Village |
Bogalusa is the largest city in Washington Parish, with a population of 10,303.
Angie is the smallest city in Washington Parish, with a population of 250.
There are 4 cities in Washington Parish, Louisiana.