| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Harrison | 1 | 13,957 | 13,060 | 1.12% | 1,255 | 11 | City |
| Diamond City | 2 | 880 | 765 | 2.21% | 312 | 3 | City |
| Bergman | 3 | 423 | 418 | 0.24% | 324 | 1 | Town |
| Bellefonte | 4 | 421 | 418 | 0.24% | 677 | 1 | Town |
| Alpena | 5 | 390 | 379 | 0.52% | 293 | 1 | Town |
| Lead Hill | 6 | 273 | 267 | 0.37% | 472 | 1 | Town |
| Valley Springs | 7 | 180 | 178 | 0% | 350 | 1 | Town |
| Omaha | 8 | 132 | 129 | 0% | 338 | 0 | Town |
| Everton | 9 | 106 | 102 | 0.95% | 224 | 0 | Town |
| Zinc | 10 | 87 | 84 | 0% | 116 | 1 | Town |
| South Lead Hill | 11 | 81 | 78 | 0% | 494 | 0 | Town |
Harrison is the largest city in Boone County, with a population of 13,957.
South Lead Hill is the smallest city in Boone County, with a population of 81.
There are 11 cities in Boone County, Arkansas.