39 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Franklin township | 1 | 2,932 | 2,889 | 0.31% | 72 | 40.64 | Township |
| Olivia | 2 | 2,250 | 2,347 | -0.84% | 929 | 2.42 | City |
| Renville | 3 | 1,241 | 1,300 | -0.96% | 939 | 1.32 | City |
| Fairfax | 4 | 1,190 | 1,247 | -0.92% | 908 | 1.31 | City |
| Hector | 5 | 970 | 1,019 | -1.02% | 537 | 1.81 | City |
| Bird Island | 6 | 959 | 1,004 | -0.93% | 655 | 1.46 | City |
| Buffalo Lake | 7 | 624 | 653 | -0.95% | 915 | 0.68 | City |
| Franklin | 8 | 521 | 493 | 1.17% | 518 | 1 | City |
| Sacred Heart | 9 | 478 | 507 | -1.24% | 482 | 0.99 | City |
| Danube | 10 | 436 | 458 | -0.91% | 895 | 0.49 | City |
| Morton | 11 | 389 | 409 | -1.02% | 321 | 1.21 | City |
| Boon Lake township | 12 | 340 | 353 | -0.87% | 9 | 37.33 | Township |
| Wang township | 13 | 238 | 245 | -0.83% | 7 | 36.23 | Township |
| Preston Lake township | 14 | 236 | 244 | -0.84% | 6 | 37.25 | Township |
| Troy township | 15 | 235 | 251 | -2.08% | 7 | 34.84 | Township |
| Sacred Heart township | 16 | 234 | 244 | -0.85% | 5 | 51.71 | Township |
| Winfield township | 17 | 221 | 230 | -0.9% | 6 | 36.47 | Township |
| Ericson township | 18 | 212 | 221 | -0.93% | 6 | 36.30 | Township |
| Birch Cooley township | 19 | 210 | 223 | -1.87% | 5 | 41.52 | Township |
| Beaver Falls township | 20 | 199 | 208 | -1% | 7 | 27.12 | Township |
| Hector township | 21 | 192 | 197 | -0.52% | 6 | 34.51 | Township |
| Hawk Creek township | 22 | 190 | 197 | -0.52% | 6 | 30.47 | Township |
| Bird Island township | 23 | 189 | 196 | -0.53% | 6 | 32.94 | Township |
| Melville township | 24 | 189 | 194 | -0.53% | 5 | 36.37 | Township |
| Cairo township | 25 | 187 | 194 | -0.53% | 6 | 33.91 | Township |
| Henryville township | 26 | 170 | 179 | -1.16% | 5 | 36.24 | Township |
| Emmet township | 27 | 169 | 178 | -1.17% | 5 | 34.63 | Township |
| Crooks township | 28 | 165 | 174 | -1.2% | 5 | 36.09 | Township |
| Kingman township | 29 | 163 | 172 | -1.21% | 4 | 36.33 | Township |
| Flora township | 30 | 159 | 165 | -0.63% | 4 | 37.76 | Township |
| Palmyra township | 31 | 159 | 165 | -0.63% | 4 | 36.25 | Township |
| Camp township | 32 | 157 | 164 | -1.26% | 6 | 28.48 | Township |
| Fairfax township | 33 | 154 | 160 | -1.28% | 4 | 35.97 | Township |
| Martinsburg township | 34 | 153 | 159 | -0.65% | 4 | 36.49 | Township |
| Wellington township | 35 | 149 | 155 | -0.67% | 4 | 36.28 | Township |
| Norfolk township | 36 | 142 | 148 | -0.7% | 4 | 35.68 | Township |
| Brookfield township | 37 | 134 | 140 | -0.74% | 4 | 36.13 | Township |
| Bandon township | 38 | 126 | 132 | -0.79% | 3 | 36.58 | Township |
| Osceola township | 39 | 124 | 129 | -0.8% | 3 | 36.29 | Township |
Franklin township is the largest city in Renville County, with a population of 2,932.
Osceola township is the smallest city in Renville County.
There are 39 cities in Renville County, Minnesota.