31 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Fayetteville | 1 | 105,221 | 94,311 | 2.02% | 1,922 | 55 | City |
| Fayetteville | 2 | 105,221 | 94,784 | 2.02% | 1,922 | 55 | City |
| Springdale | 3 | 89,877 | 87,323 | 0.57% | 1,806 | 50 | City |
| Springdale | 4 | 89,877 | 87,329 | 0.57% | 1,806 | 50 | City |
| Farmington | 5 | 11,185 | 7,587 | 6.8% | 1,138 | 10 | City |
| Farmington | 6 | 11,185 | 7,622 | 6.8% | 1,138 | 10 | City |
| Prairie Grove | 7 | 8,953 | 7,063 | 4.24% | 960 | 9 | City |
| Prairie Grove | 8 | 8,953 | 7,133 | 4.24% | 960 | 9 | City |
| Tontitown | 9 | 8,755 | 4,284 | 10.25% | 489 | 18 | City |
| Tontitown | 10 | 8,755 | 4,685 | 10.25% | 489 | 18 | City |
| Elkins | 11 | 4,122 | 3,599 | 2.41% | 1,064 | 4 | City |
| Elkins | 12 | 4,122 | 3,636 | 2.41% | 1,064 | 4 | City |
| Johnson | 13 | 3,728 | 3,603 | 0.62% | 1,032 | 4 | City |
| Johnson | 14 | 3,728 | 3,610 | 0.62% | 1,032 | 4 | City |
| Elm Springs | 15 | 2,989 | 2,371 | 4.07% | 502 | 6 | City |
| Elm Springs | 16 | 2,989 | 2,402 | 4.07% | 502 | 6 | City |
| Goshen | 17 | 2,450 | 2,101 | 2.81% | 217 | 11 | Town |
| Goshen | 18 | 2,450 | 2,112 | 2.81% | 217 | 11 | Town |
| Lincoln | 19 | 2,392 | 2,287 | 0.89% | 835 | 3 | City |
| Lincoln | 20 | 2,392 | 2,285 | 0.89% | 835 | 3 | City |
| West Fork | 21 | 2,362 | 2,336 | 0.25% | 632 | 4 | City |
| West Fork | 22 | 2,362 | 2,329 | 0.25% | 632 | 4 | City |
| Greenland | 23 | 1,244 | 1,223 | 0.32% | 310 | 4 | City |
| Greenland | 24 | 1,244 | 1,222 | 0.32% | 310 | 4 | City |
| Cincinnati | 25 | 774 | 462 | 7.2% | 103 | 7 | CDP |
| Morrow | 26 | 438 | 378 | 7.35% | 153 | 3 | CDP |
| Summers | 27 | 428 | 147 | 7.27% | 176 | 2 | CDP |
| Winslow | 28 | 364 | 365 | 0% | 200 | 2 | City |
| Winslow | 29 | 364 | 364 | 0% | 200 | 2 | City |
| Canehill | 30 | 112 | 217 | 6.67% | 51 | 2 | CDP |
| Evansville | 31 | 93 | 21 | 8.14% | 64 | 1 | CDP |
Fayetteville is the largest city in Washington County, with a population of 105,221.
Evansville is the smallest city in Washington County, with a population of 93.
There are 31 cities in Washington County, Arkansas.