40 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Coffeyville | 1 | 8,414 | 8,803 | -0.92% | 889 | 9.47 | City |
| Independence | 2 | 8,155 | 8,555 | -0.97% | 1,063 | 7.67 | City |
| Independence township | 3 | 2,166 | 2,249 | -0.73% | 36 | 60.66 | Township |
| Cherryvale | 4 | 2,092 | 2,182 | -0.85% | 1,044 | 2 | City |
| Fawn Creek township | 5 | 1,768 | 1,848 | -0.95% | 26 | 68.94 | Township |
| Caney | 6 | 1,698 | 1,783 | -0.99% | 1,256 | 1.35 | City |
| Caney township | 7 | 1,086 | 1,135 | -0.82% | 16 | 67.44 | Township |
| Liberty township | 8 | 990 | 953 | 0.81% | 15 | 63.98 | Township |
| Sycamore township | 9 | 781 | 818 | -0.89% | 12 | 64.75 | Township |
| Liberty township | 10 | 548 | 549 | 0.37% | 8 | 71.51 | Township |
| Drum Creek township | 11 | 473 | 496 | -1.05% | 13 | 35.17 | Township |
| Liberty township | 12 | 459 | 482 | -1.08% | 11 | 43.56 | Township |
| Cherry township | 13 | 445 | 471 | -1.33% | 11 | 39.25 | Township |
| Liberty township | 14 | 417 | 424 | 0.24% | 12 | 36.17 | Township |
| Dearing | 15 | 368 | 380 | -0.54% | 243 | 1.51 | City |
| Liberty township | 16 | 352 | 352 | 0% | 10 | 35.38 | Township |
| Sycamore township | 17 | 329 | 326 | 0% | 3 | 113.97 | Township |
| Liberty township | 18 | 321 | 309 | 1.26% | 7 | 43.74 | Township |
| Independence township | 19 | 261 | 262 | 0% | 7 | 36.98 | Township |
| West Cherry township | 20 | 260 | 273 | -1.14% | 7 | 39.30 | Township |
| Rutland township | 21 | 256 | 266 | -0.78% | 4 | 71.24 | Township |
| Elk City | 22 | 251 | 258 | -0.4% | 743 | 0.34 | City |
| Liberty township | 23 | 209 | 213 | -0.48% | 6 | 33.91 | Township |
| Tyro | 24 | 168 | 177 | -1.18% | 368 | 0.46 | City |
| Liberty township | 25 | 168 | 175 | -1.18% | 5 | 35.95 | Township |
| Liberty township | 26 | 167 | 182 | -1.76% | 3 | 65.71 | Township |
| Liberty township | 27 | 159 | 160 | -0.63% | 2 | 85.64 | Township |
| Liberty township | 28 | 156 | 156 | 0% | 3 | 47.98 | Township |
| Sycamore | 29 | 154 | 205 | 6.94% | 79 | 1.94 | CDP |
| Liberty township | 30 | 114 | 113 | 0.88% | 2 | 59.12 | Township |
| Liberty township | 31 | 108 | 118 | -1.82% | 3 | 36.24 | Township |
| Liberty | 32 | 93 | 98 | -1.06% | 371 | 0.25 | City |
| Independence township | 33 | 91 | 91 | 0% | 3 | 35.60 | Township |
| Havana | 34 | 79 | 83 | -1.25% | 503 | 0.16 | City |
| Liberty township | 35 | 63 | 62 | 1.61% | 2 | 35.13 | Township |
| Liberty township | 36 | 41 | 41 | 0% | 1 | 36.13 | Township |
| Liberty township | 37 | 30 | 31 | 0% | 0.00 | 99.21 | Township |
| Independence township | 38 | 25 | 28 | -3.85% | 1 | 35.45 | Township |
| Liberty township | 39 | 13 | 16 | -7.14% | 0.00 | 59.80 | Township |
| Liberty township | 40 | 13 | 13 | 0% | 0.00 | 35.79 | Township |
Coffeyville is the largest city in Montgomery County, with a population of 8,414.
Liberty township is the smallest city in Montgomery County.
There are 40 cities in Montgomery County, Kansas.