26 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Ardmore | 1 | 25,147 | 24,720 | 0.33% | 505 | 50 | City |
| Ardmore | 2 | 25,147 | 24,730 | 0.33% | 505 | 50 | City |
| Lone Grove | 3 | 5,344 | 4,990 | 1.29% | 215 | 25 | City |
| Lone Grove | 4 | 5,344 | 5,002 | 1.29% | 215 | 25 | City |
| Healdton | 5 | 2,382 | 2,350 | 0.25% | 148 | 16 | City |
| Healdton | 6 | 2,382 | 2,351 | 0.25% | 148 | 16 | City |
| Wilson | 7 | 1,455 | 1,404 | 0.69% | 258 | 6 | City |
| Wilson | 8 | 1,455 | 1,405 | 0.69% | 258 | 6 | City |
| Dickson | 9 | 1,382 | 1,332 | 0.73% | 99 | 14 | Town |
| Dickson | 10 | 1,382 | 1,332 | 0.73% | 99 | 14 | Town |
| Cumberland | 11 | 936 | 869 | 7.09% | 735 | 1 | CDP |
| Oakland | 12 | 933 | 842 | 1.86% | 652 | 1 | Town |
| Oakland | 13 | 933 | 846 | 1.86% | 652 | 1 | Town |
| Springer | 14 | 712 | 687 | 0.71% | 48 | 15 | Town |
| Springer | 15 | 712 | 687 | 0.71% | 48 | 15 | Town |
| Hennepin | 16 | 180 | 114 | 7.14% | 113 | 2 | CDP |
| Gene Autry | 17 | 159 | 154 | 0.63% | 39 | 4 | Town |
| Gene Autry | 18 | 159 | 154 | 0.63% | 39 | 4 | Town |
| Tatums | 19 | 120 | 115 | 0.84% | 60 | 2 | Town |
| Tatums | 20 | 120 | 115 | 0.84% | 60 | 2 | Town |
| Cornish | 21 | 113 | 112 | 0% | 188 | 1 | Town |
| Cornish | 22 | 113 | 112 | 0% | 188 | 1 | Town |
| Little City | 23 | 89 | 104 | 7.23% | 223 | 0 | CDP |
| Fox | 24 | 66 | 63 | 6.45% | 115 | 1 | CDP |
| Ratliff City | 25 | 65 | 64 | 0% | 58 | 1 | Town |
| Ratliff City | 26 | 65 | 64 | 0% | 58 | 1 | Town |
Ardmore is the largest city in Carter County, with a population of 25,147.
Ratliff City is the smallest city in Carter County, with a population of 65.
There are 26 cities in Carter County, Oklahoma.