8 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Mena | 1 | 5,601 | 5,564 | 0.13% | 813 | 7 | City |
| Wickes | 2 | 659 | 639 | 0.61% | 284 | 2 | Town |
| Grannis | 3 | 499 | 496 | 0% | 63 | 8 | City |
| Hatfield | 4 | 349 | 348 | 0% | 262 | 1 | Town |
| Cove | 5 | 330 | 320 | 0.61% | 207 | 2 | Town |
| Acorn | 6 | 156 | 324 | 6.85% | 39 | 4 | CDP |
| Vandervoort | 7 | 113 | 112 | 0% | 392 | 0 | Town |
| Board Camp | 8 | 87 | 74 | 6.1% | 29 | 3 | CDP |
Mena is the largest city in Polk County, with a population of 5,601.
Board Camp is the smallest city in Polk County, with a population of 87.
There are 8 cities in Polk County, Arkansas.