9 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Coffeyville | 1 | 8,415 | 8,804 | -0.77% | 874 | 10 | City |
| Independence | 2 | 8,154 | 8,553 | -0.8% | 1,087 | 8 | City |
| Cherryvale | 3 | 2,080 | 2,181 | -0.81% | 1,038 | 2 | City |
| Caney | 4 | 1,698 | 1,781 | -0.82% | 1,256 | 1 | City |
| Dearing | 5 | 368 | 380 | -0.54% | 243 | 2 | City |
| Elk City | 6 | 246 | 257 | -0.81% | 728 | 0 | City |
| Tyro | 7 | 165 | 176 | -1.2% | 361 | 0 | City |
| Liberty | 8 | 93 | 98 | -1.06% | 371 | 0 | City |
| Havana | 9 | 82 | 84 | 0% | 522 | 0 | City |
Coffeyville is the largest city in Montgomery County, with a population of 8,415.
Havana is the smallest city in Montgomery County, with a population of 82.
There are 9 cities in Montgomery County, Kansas.