18 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Rogers | 1 | 78,278 | 70,360 | 1.72% | 2,038 | 38 | City |
| Bentonville | 2 | 65,277 | 54,819 | 2.74% | 1,842 | 35 | City |
| Bella Vista | 3 | 34,802 | 30,217 | 2.24% | 768 | 45 | City |
| Centerton | 4 | 29,493 | 18,249 | 6.79% | 2,067 | 14 | City |
| Siloam Springs | 5 | 21,352 | 17,521 | 3.09% | 1,736 | 12 | City |
| Lowell | 6 | 12,378 | 9,947 | 3.38% | 1,284 | 10 | City |
| Pea Ridge | 7 | 11,949 | 6,672 | 7.95% | 1,425 | 8 | City |
| Cave Springs | 8 | 6,650 | 5,611 | 2.67% | 778 | 9 | City |
| Gentry | 9 | 5,083 | 3,850 | 4.22% | 851 | 6 | City |
| Gravette | 10 | 3,954 | 3,569 | 1.65% | 259 | 15 | City |
| Highfill | 11 | 3,358 | 1,662 | 9.2% | 179 | 19 | Town |
| Little Flock | 12 | 3,031 | 3,058 | -0.13% | 404 | 8 | City |
| Decatur | 13 | 1,689 | 1,790 | -1% | 355 | 5 | City |
| Garfield | 14 | 632 | 602 | 0.8% | 204 | 3 | Town |
| Avoca | 15 | 507 | 488 | 0.6% | 263 | 2 | Town |
| Sulphur Springs | 16 | 471 | 482 | -0.42% | 466 | 1 | City |
| Gateway | 17 | 459 | 437 | 0.88% | 70 | 7 | Town |
| Springtown | 18 | 92 | 83 | 2.22% | 170 | 1 | Town |
Rogers is the largest city in Benton County, with a population of 78,278.
Springtown is the smallest city in Benton County, with a population of 92.
There are 18 cities in Benton County, Arkansas.