40 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Coffeyville | 1 | 8,480 | 8,804 | -0.76% | 896 | 9 | City |
| Independence | 2 | 8,220 | 8,553 | -0.81% | 1,072 | 8 | City |
| Independence | 3 | 2,161 | 2,247 | -0.92% | 36 | 61 | Township |
| Cherryvale | 4 | 2,097 | 2,181 | -0.8% | 1,046 | 2 | City |
| Fawn Creek | 5 | 1,782 | 1,845 | -0.89% | 26 | 69 | Township |
| Caney | 6 | 1,712 | 1,781 | -0.81% | 1,266 | 1 | City |
| Caney | 7 | 1,088 | 1,138 | -1.18% | 16 | 67 | Township |
| Liberty | 8 | 963 | 951 | -0.62% | 15 | 64 | Township |
| Sycamore | 9 | 781 | 820 | -1.26% | 12 | 65 | Township |
| Liberty | 10 | 545 | 549 | 0.18% | 8 | 72 | Township |
| Drum Creek | 11 | 475 | 492 | -1.04% | 14 | 35 | Township |
| Liberty | 12 | 461 | 482 | -1.07% | 11 | 44 | Township |
| Cherry | 13 | 454 | 473 | -0.87% | 12 | 39 | Township |
| Liberty | 14 | 422 | 426 | 0% | 12 | 36 | Township |
| Dearing | 15 | 370 | 380 | -0.54% | 244 | 2 | City |
| Liberty | 16 | 343 | 348 | -1.15% | 10 | 35 | Township |
| Liberty | 17 | 314 | 306 | 0.64% | 7 | 44 | Township |
| Sycamore | 18 | 313 | 322 | -1.88% | 3 | 114 | Township |
| West Cherry | 19 | 265 | 274 | -0.75% | 7 | 39 | Township |
| Independence | 20 | 264 | 259 | 0.76% | 7 | 37 | Township |
| Rutland | 21 | 257 | 266 | -0.77% | 4 | 71 | Township |
| Elk City | 22 | 248 | 257 | -0.8% | 734 | 0 | City |
| Liberty | 23 | 208 | 212 | -0.48% | 6 | 34 | Township |
| Liberty | 24 | 177 | 179 | 1.72% | 3 | 66 | Township |
| Liberty | 25 | 177 | 175 | 1.14% | 5 | 36 | Township |
| Tyro | 26 | 167 | 176 | -1.18% | 365 | 0 | City |
| Liberty | 27 | 161 | 159 | 0% | 2 | 86 | Township |
| Liberty | 28 | 155 | 156 | -0.64% | 3 | 48 | Township |
| Sycamore | 29 | 154 | 205 | 6.94% | 79 | 2 | CDP |
| Liberty | 30 | 108 | 112 | -1.82% | 2 | 59 | Township |
| Liberty | 31 | 108 | 118 | -1.82% | 3 | 36 | Township |
| Independence | 32 | 96 | 95 | 0% | 3 | 36 | Township |
| Liberty | 33 | 94 | 98 | -1.05% | 375 | 0 | City |
| Havana | 34 | 82 | 84 | -1.2% | 522 | 0 | City |
| Liberty | 35 | 61 | 63 | -1.61% | 2 | 35 | Township |
| Liberty | 36 | 43 | 43 | 0% | 1 | 36 | Township |
| Liberty | 37 | 32 | 33 | 0% | 0.00 | 99 | Township |
| Independence | 38 | 25 | 27 | -3.85% | 1 | 35 | Township |
| Liberty | 39 | 18 | 20 | -5.26% | 1 | 36 | Township |
| Liberty | 40 | 15 | 16 | 0% | 0.00 | 60 | Township |
Coffeyville is the largest city in Montgomery County, with a population of 8,480.
Liberty is the smallest city in Montgomery County, with a population of 15.
There are 40 cities in Montgomery County, Kansas.