| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Arkadelphia | 1 | 9,808 | 10,361 | -1.09% | 1,269 | 8 | City |
| Gurdon | 2 | 1,812 | 1,841 | -0.28% | 747 | 2 | City |
| Amity | 3 | 673 | 675 | -0.15% | 210 | 3 | City |
| Caddo Valley | 4 | 587 | 590 | -0.17% | 189 | 3 | Town |
| Okolona | 5 | 98 | 97 | 0% | 124 | 1 | Town |
| Gum Springs | 6 | 91 | 91 | 0% | 233 | 0 | Town |
| Whelen Springs | 7 | 46 | 46 | -2.13% | 197 | 0 | Town |
Arkadelphia is the largest city in Clark County, with a population of 9,808.
Whelen Springs is the smallest city in Clark County, with a population of 46.
There are 7 cities in Clark County, Arkansas.