| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Fayetteville | 1 | 108,857 | 94,779 | 2.1% | 1,988 | 55 | City |
| Springdale | 2 | 91,267 | 87,321 | 0.64% | 1,834 | 50 | City |
| Farmington | 3 | 11,379 | 7,623 | 6.76% | 1,158 | 10 | City |
| Prairie Grove | 4 | 9,372 | 7,132 | 4.16% | 1,005 | 9 | City |
| Tontitown | 5 | 8,866 | 4,686 | 10.19% | 495 | 18 | City |
| Elkins | 6 | 4,284 | 3,636 | 2.39% | 1,106 | 4 | City |
| Johnson | 7 | 3,710 | 3,605 | 0.71% | 1,027 | 4 | City |
| Elm Springs | 8 | 2,972 | 2,401 | 4.21% | 499 | 6 | City |
| Goshen | 9 | 2,474 | 2,111 | 2.87% | 219 | 11 | Town |
| Lincoln | 10 | 2,395 | 2,282 | 1.05% | 836 | 3 | City |
| West Fork | 11 | 2,384 | 2,338 | 0.46% | 638 | 4 | City |
| Greenland | 12 | 1,549 | 1,540 | 0.32% | 236 | 7 | City |
| Winslow | 13 | 362 | 365 | 0% | 199 | 2 | City |
Fayetteville is the largest city in Washington County, with a population of 108,857.
Winslow is the smallest city in Washington County, with a population of 362.
There are 13 cities in Washington County, Arkansas.