| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Bogalusa | 1 | 10,267 | 10,630 | -0.52% | 1,080 | 10 | City |
| Franklinton | 2 | 3,565 | 3,641 | -0.31% | 816 | 4 | Town |
| Varnado | 3 | 316 | 322 | -0.32% | 372 | 1 | Village |
| Angie | 4 | 245 | 247 | -0.41% | 160 | 2 | Village |
Bogalusa is the largest city in Washington Parish, with a population of 10,267.
Angie is the smallest city in Washington Parish, with a population of 245.
There are 4 cities in Washington Parish, Louisiana.