18 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Luverne | 1 | 4,908 | 4,932 | -0.1% | 1,336 | 3.67 | City |
| Hills | 2 | 657 | 684 | -0.76% | 1,043 | 0.63 | City |
| Jasper | 3 | 584 | 613 | -1.02% | 573 | 1.02 | City |
| Luverne township | 4 | 447 | 464 | -0.89% | 14 | 32.23 | Township |
| Beaver Creek township | 5 | 366 | 385 | -1.35% | 8 | 48.19 | Township |
| Martin township | 6 | 363 | 379 | -1.09% | 8 | 47.94 | Township |
| Beaver Creek | 7 | 266 | 285 | -1.48% | 503 | 0.53 | City |
| Springwater township | 8 | 253 | 264 | -1.17% | 5 | 48.62 | Township |
| Magnolia township | 9 | 213 | 220 | -0.93% | 6 | 35.21 | Township |
| Battle Plain township | 10 | 189 | 193 | 0% | 5 | 36.28 | Township |
| Magnolia | 11 | 186 | 195 | -1.06% | 233 | 0.80 | City |
| Hardwick | 12 | 175 | 189 | -1.69% | 100 | 1.76 | City |
| Steen | 13 | 158 | 172 | -1.86% | 362 | 0.44 | City |
| Denver township | 14 | 154 | 161 | -1.28% | 5 | 34.16 | Township |
| Rose Dell township | 15 | 154 | 157 | 0% | 3 | 48.04 | Township |
| Vienna township | 16 | 153 | 153 | 0.66% | 4 | 34.97 | Township |
| Sherman | 17 | 71 | 81 | -2.74% | 276 | 0.26 | Town |
| Kenneth | 18 | 59 | 63 | -1.67% | 56 | 1.06 | City |
Luverne is the largest city in Rock County, with a population of 4,908.
Kenneth is the smallest city in Rock County.
There are 18 cities in Rock County, Minnesota.