13 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Fayetteville | 1 | 107,309 | 94,784 | 1.98% | 1,960 | 55 | City |
| Springdale | 2 | 90,387 | 87,329 | 0.57% | 1,816 | 50 | City |
| Farmington | 3 | 11,898 | 7,622 | 6.37% | 1,211 | 10 | City |
| Tontitown | 4 | 9,569 | 4,685 | 9.3% | 534 | 18 | City |
| Prairie Grove | 5 | 9,317 | 7,133 | 4.07% | 999 | 9 | City |
| Elkins | 6 | 4,219 | 3,636 | 2.35% | 1,089 | 4 | City |
| Johnson | 7 | 3,752 | 3,610 | 0.64% | 1,038 | 4 | City |
| Elm Springs | 8 | 3,107 | 2,402 | 3.95% | 522 | 6 | City |
| Goshen | 9 | 2,518 | 2,112 | 2.78% | 223 | 11 | Town |
| Lincoln | 10 | 2,414 | 2,285 | 0.92% | 842 | 3 | City |
| West Fork | 11 | 2,369 | 2,329 | 0.3% | 634 | 4 | City |
| Greenland | 12 | 1,249 | 1,222 | 0.4% | 190 | 7 | City |
| Winslow | 13 | 364 | 364 | 0% | 200 | 2 | City |
Fayetteville is the largest city in Washington County, with a population of 107,309.
Winslow is the smallest city in Washington County, with a population of 364.
There are 13 cities in Washington County, Arkansas.