| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Ardmore | 1 | 25,049 | 24,706 | 0.37% | 503 | 50 | City |
| Lone Grove | 2 | 5,310 | 5,007 | 1.26% | 214 | 25 | City |
| Healdton | 3 | 2,355 | 2,350 | 0.21% | 147 | 16 | City |
| Wilson | 4 | 1,449 | 1,404 | 0.69% | 257 | 6 | City |
| Dickson | 5 | 1,373 | 1,332 | 0.73% | 98 | 14 | Town |
| Oakland | 6 | 945 | 845 | 1.94% | 661 | 1 | Town |
| Springer | 7 | 705 | 686 | 0.57% | 47 | 15 | Town |
| Gene Autry | 8 | 157 | 151 | 0.64% | 39 | 4 | Town |
| Tatums | 9 | 118 | 115 | 0% | 59 | 2 | Town |
| Cornish | 10 | 112 | 111 | 0% | 186 | 1 | Town |
| Ratliff City | 11 | 65 | 65 | 0% | 58 | 1 | Town |
Ardmore is the largest city in Carter County, with a population of 25,049.
Ratliff City is the smallest city in Carter County, with a population of 65.
There are 11 cities in Carter County, Oklahoma.