| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Rogers | 1 | 78,308 | 70,090 | 1.76% | 2,039 | 38 | City |
| Bentonville | 2 | 64,831 | 54,814 | 2.81% | 1,829 | 35 | City |
| Bella Vista | 3 | 35,284 | 30,221 | 2.22% | 779 | 45 | City |
| Centerton | 4 | 29,041 | 18,248 | 6.86% | 2,035 | 14 | City |
| Siloam Springs | 5 | 21,965 | 17,533 | 3.13% | 1,785 | 12 | City |
| Lowell | 6 | 12,591 | 9,946 | 3.34% | 1,306 | 10 | City |
| Pea Ridge | 7 | 12,113 | 6,674 | 7.83% | 1,445 | 8 | City |
| Cave Springs | 8 | 6,876 | 5,880 | 2.61% | 804 | 9 | City |
| Gentry | 9 | 5,106 | 3,851 | 4.23% | 854 | 6 | City |
| Highfill | 10 | 3,961 | 1,672 | 7.75% | 211 | 19 | Town |
| Gravette | 11 | 3,952 | 3,573 | 1.62% | 258 | 15 | City |
| Little Flock | 12 | 3,033 | 3,059 | -0.2% | 404 | 8 | City |
| Decatur | 13 | 1,878 | 1,789 | -0.79% | 395 | 5 | City |
| Garfield | 14 | 636 | 602 | 0.79% | 206 | 3 | Town |
| Avoca | 15 | 549 | 485 | 0.73% | 284 | 2 | Town |
| Sulphur Springs | 16 | 481 | 489 | -0.41% | 476 | 1 | City |
| Gateway | 17 | 461 | 435 | 0.88% | 70 | 7 | Town |
| Springtown | 18 | 94 | 84 | 1.08% | 174 | 1 | Town |
Rogers is the largest city in Benton County, with a population of 78,308.
Springtown is the smallest city in Benton County, with a population of 94.
There are 18 cities in Benton County, Arkansas.