17 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| La Crosse-Brookdale | 1 | 1,279 | 1,347 | -0.78% | 15 | 84 | Township |
| La Crosse | 2 | 1,194 | 1,264 | -1.16% | 1,153 | 1 | City |
| Pioneer | 3 | 337 | 359 | -1.17% | 8 | 42 | Township |
| Otis | 4 | 278 | 296 | -1.42% | 888 | 0 | City |
| Hampton-Fairview | 5 | 224 | 237 | -0.88% | 2 | 106 | Township |
| Lone Star | 6 | 224 | 238 | -0.88% | 5 | 42 | Township |
| Center | 7 | 184 | 196 | -1.08% | 3 | 54 | Township |
| Bison | 8 | 166 | 178 | -1.78% | 626 | 0 | City |
| Big Timber | 9 | 134 | 139 | 0% | 3 | 47 | Township |
| Rush Center | 10 | 130 | 139 | -1.52% | 360 | 0 | City |
| Banner | 11 | 117 | 127 | -1.68% | 2 | 54 | Township |
| Liebenthal | 12 | 88 | 92 | -1.12% | 786 | 0 | City |
| Alexander-Belle Prairie | 13 | 75 | 78 | 0% | 1 | 85 | Township |
| Alexander | 14 | 47 | 50 | -2.08% | 181 | 0 | City |
| Illinois | 15 | 47 | 49 | 0% | 1 | 48 | Township |
| Union | 16 | 41 | 43 | 0% | 1 | 54 | Township |
| Pleasantdale | 17 | 22 | 23 | 0% | 0.00 | 48 | Township |
La Crosse-Brookdale is the largest city in Rush County, with a population of 1,279.
Pleasantdale is the smallest city in Rush County, with a population of 22.
There are 17 cities in Rush County, Kansas.