| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Ponca City | 1 | 24,221 | 24,353 | -0.02% | 1,332 | 18 | City |
| Blackwell | 2 | 6,021 | 6,068 | -0.13% | 1,079 | 6 | City |
| Tonkawa | 3 | 2,979 | 3,010 | -0.13% | 722 | 4 | City |
| Newkirk | 4 | 2,248 | 2,244 | 0.09% | 1,659 | 1 | City |
| Kaw City | 5 | 322 | 315 | 0.31% | 107 | 3 | City |
| Braman | 6 | 163 | 162 | 0% | 832 | 0 | Town |
| Kildare | 7 | 92 | 90 | 0% | 676 | 0 | Town |
| Webb City | 8 | 61 | 58 | 0% | 242 | 0 | Town |
| Grainola | 9 | 35 | 36 | 0% | 145 | 0 | Town |
| Foraker | 10 | 17 | 15 | 0% | 65 | 0 | Town |
Ponca City is the largest city in Kay County, with a population of 24,221.
Foraker is the smallest city in Kay County, with a population of 17.
There are 10 cities in Kay County, Oklahoma.