4 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Bogalusa | 1 | 10,240 | 10,620 | -0.61% | 1,077 | 10 | City |
| Franklinton | 2 | 3,569 | 3,638 | -0.31% | 817 | 4 | Town |
| Varnado | 3 | 316 | 322 | -0.32% | 372 | 1 | Village |
| Angie | 4 | 250 | 252 | 0% | 163 | 2 | Village |
Bogalusa is the largest city in Washington Parish, with a population of 10,240.
Angie is the smallest city in Washington Parish, with a population of 250.
There are 4 cities in Washington Parish, Louisiana.