17 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| La Crosse-Brookdale township | 1 | 1,205 | 1,341 | -3.68% | 14 | 84.30 | Township |
| La Crosse | 2 | 1,180 | 1,252 | -1.17% | 1,139 | 1.04 | City |
| Pioneer township | 3 | 313 | 359 | -4.57% | 8 | 41.65 | Township |
| Otis | 4 | 278 | 298 | -1.42% | 888 | 0.31 | City |
| Lone Star township | 5 | 213 | 238 | -3.62% | 5 | 42.33 | Township |
| Hampton-Fairview township | 6 | 208 | 235 | -4.15% | 2 | 106.44 | Township |
| Center township | 7 | 180 | 200 | -3.74% | 3 | 53.74 | Township |
| Bison | 8 | 166 | 178 | -1.19% | 626 | 0.27 | City |
| Rush Center | 9 | 133 | 140 | -0.75% | 368 | 0.36 | City |
| Big Timber township | 10 | 118 | 138 | -5.6% | 2 | 47.21 | Township |
| Banner township | 11 | 106 | 127 | -6.19% | 2 | 53.61 | Township |
| Liebenthal | 12 | 84 | 91 | -1.18% | 750 | 0.11 | City |
| Alexander-Belle Prairie township | 13 | 73 | 82 | -3.95% | 1 | 84.81 | Township |
| Alexander | 14 | 46 | 50 | -2.13% | 178 | 0.26 | City |
| Illinois township | 15 | 43 | 49 | -4.44% | 1 | 48.02 | Township |
| Union township | 16 | 33 | 39 | -5.71% | 1 | 54.25 | Township |
| Pleasantdale township | 17 | 20 | 23 | -4.76% | 0.00 | 47.82 | Township |
La Crosse-Brookdale township is the largest city in Rush County, with a population of 1,205.
Pleasantdale township is the smallest city in Rush County.
There are 17 cities in Rush County, Kansas.