21 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Burlington | 1 | 2,578 | 2,632 | -0.35% | 1,145 | 2 | City |
| Rock Creek | 2 | 931 | 925 | 0.65% | 17 | 54 | Township |
| Lebo | 3 | 887 | 887 | 0% | 927 | 1 | City |
| Ottumwa | 4 | 713 | 719 | 0.14% | 15 | 47 | Township |
| Waverly | 5 | 567 | 576 | -0.18% | 775 | 1 | City |
| LeRoy | 6 | 552 | 550 | 0.55% | 27 | 21 | Township |
| Neosho Falls | 7 | 453 | 436 | 0.22% | 6 | 75 | Township |
| LeRoy | 8 | 444 | 449 | -0.22% | 539 | 1 | City |
| New Strawn | 9 | 417 | 423 | -0.24% | 526 | 1 | City |
| Burlington | 10 | 378 | 374 | 0.53% | 12 | 31 | Township |
| Gridley | 11 | 312 | 315 | 0% | 729 | 0 | City |
| Pleasant | 12 | 262 | 255 | 0.77% | 4 | 60 | Township |
| Key West | 13 | 244 | 249 | -0.41% | 5 | 47 | Township |
| Pottawatomie | 14 | 197 | 195 | 0.51% | 4 | 54 | Township |
| Avon | 15 | 165 | 170 | -0.6% | 5 | 31 | Township |
| Star | 16 | 152 | 154 | 0% | 4 | 35 | Township |
| Hampden | 17 | 143 | 138 | 1.42% | 6 | 22 | Township |
| Neosho Falls | 18 | 140 | 133 | 0.72% | 276 | 1 | City |
| Neosho | 19 | 122 | 117 | 1.67% | 3 | 48 | Township |
| Spring Creek | 20 | 109 | 110 | 0% | 3 | 35 | Township |
| Olivet | 21 | 75 | 72 | 1.35% | 298 | 0 | City |
Burlington is the largest city in Coffey County, with a population of 2,578.
Olivet is the smallest city in Coffey County, with a population of 75.
There are 21 cities in Coffey County, Kansas.