18 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Ada | 1 | 16,601 | 16,479 | 0.14% | 856 | 19 | City |
| Ada | 2 | 16,601 | 16,486 | 0.14% | 856 | 19 | City |
| Latta | 3 | 1,608 | 1,021 | 7.2% | 638 | 3 | CDP |
| Byng | 4 | 1,405 | 1,394 | 0.14% | 215 | 7 | Town |
| Byng | 5 | 1,405 | 1,395 | 0.14% | 215 | 7 | Town |
| Pickett | 6 | 1,235 | 822 | 7.11% | 382 | 3 | CDP |
| Allen | 7 | 803 | 802 | 0% | 854 | 1 | Town |
| Allen | 8 | 803 | 802 | 0% | 854 | 1 | Town |
| Roff | 9 | 627 | 635 | -0.32% | 680 | 1 | Town |
| Roff | 10 | 627 | 635 | -0.32% | 680 | 1 | Town |
| Stonewall | 11 | 417 | 414 | 0% | 878 | 0 | Town |
| Stonewall | 12 | 417 | 414 | 0% | 878 | 0 | Town |
| Francis | 13 | 252 | 247 | 0.4% | 438 | 1 | Town |
| Francis | 14 | 252 | 247 | 0.4% | 438 | 1 | Town |
| Fitzhugh | 15 | 187 | 184 | 0% | 25 | 8 | Town |
| Fitzhugh | 16 | 187 | 184 | 0% | 25 | 8 | Town |
| Vanoss | 17 | 68 | 50 | 7.94% | 56 | 1 | CDP |
| Fittstown | 18 | 59 | 80 | 7.27% | 55 | 1 | CDP |
Ada is the largest city in Pontotoc County, with a population of 16,601.
Fittstown is the smallest city in Pontotoc County, with a population of 59.
There are 18 cities in Pontotoc County, Oklahoma.