8 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Mena | 1 | 5,648 | 5,573 | 0.27% | 820 | 6.89 | City |
| Wickes | 2 | 665 | 634 | 0.91% | 286 | 2.32 | Town |
| Grannis | 3 | 501 | 495 | 0.2% | 63 | 7.93 | City |
| Hatfield | 4 | 345 | 340 | 0.29% | 259 | 1.33 | Town |
| Cove | 5 | 329 | 321 | 0.61% | 206 | 1.60 | Town |
| Acorn | 6 | 156 | 324 | 6.85% | 39 | 3.98 | CDP |
| Vandervoort | 7 | 113 | 112 | 0% | 392 | 0.29 | Town |
| Board Camp | 8 | 87 | 74 | 6.1% | 29 | 2.98 | CDP |
Mena is the largest city in Polk County, with a population of 5,648.
Board Camp is the smallest city in Polk County.
There are 8 cities in Polk County, Arkansas.