39 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Franklin | 1 | 2,945 | 2,880 | 0.61% | 72 | 41 | Township |
| Olivia | 2 | 2,295 | 2,350 | -0.48% | 948 | 2 | City |
| Renville | 3 | 1,264 | 1,299 | -0.55% | 957 | 1 | City |
| Fairfax | 4 | 1,210 | 1,244 | -0.58% | 924 | 1 | City |
| Hector | 5 | 987 | 1,019 | -0.7% | 547 | 2 | City |
| Bird Island | 6 | 980 | 1,009 | -0.61% | 669 | 1 | City |
| Buffalo Lake | 7 | 638 | 651 | -0.47% | 935 | 1 | City |
| Franklin | 8 | 520 | 497 | 0.78% | 517 | 1 | City |
| Sacred Heart | 9 | 490 | 507 | -0.81% | 494 | 1 | City |
| Danube | 10 | 444 | 457 | -0.67% | 912 | 0 | City |
| Morton | 11 | 399 | 411 | -0.75% | 329 | 1 | City |
| Boon Lake | 12 | 351 | 353 | 0% | 9 | 37 | Township |
| Troy | 13 | 247 | 249 | -0.4% | 7 | 35 | Township |
| Wang | 14 | 243 | 245 | -0.41% | 7 | 36 | Township |
| Preston Lake | 15 | 241 | 244 | -0.41% | 6 | 37 | Township |
| Sacred Heart | 16 | 238 | 243 | -0.42% | 5 | 52 | Township |
| Winfield | 17 | 231 | 230 | 0.87% | 6 | 36 | Township |
| Birch Cooley | 18 | 216 | 218 | -0.46% | 5 | 42 | Township |
| Ericson | 19 | 214 | 218 | -0.47% | 6 | 36 | Township |
| Beaver Falls | 20 | 204 | 208 | -0.49% | 8 | 27 | Township |
| Hector | 21 | 196 | 197 | 0.51% | 6 | 35 | Township |
| Melville | 22 | 194 | 195 | 0% | 5 | 36 | Township |
| Hawk Creek | 23 | 193 | 198 | -0.52% | 6 | 30 | Township |
| Cairo | 24 | 189 | 194 | -0.53% | 6 | 34 | Township |
| Bird Island | 25 | 183 | 188 | -0.54% | 6 | 33 | Township |
| Henryville | 26 | 177 | 180 | 0% | 5 | 36 | Township |
| Emmet | 27 | 175 | 178 | 0% | 5 | 35 | Township |
| Kingman | 28 | 173 | 172 | 1.17% | 5 | 36 | Township |
| Crooks | 29 | 172 | 175 | 0% | 5 | 36 | Township |
| Camp | 30 | 165 | 166 | 0% | 6 | 28 | Township |
| Flora | 31 | 162 | 165 | 0% | 4 | 38 | Township |
| Palmyra | 32 | 160 | 164 | -0.62% | 4 | 36 | Township |
| Martinsburg | 33 | 159 | 159 | 0.63% | 4 | 36 | Township |
| Fairfax | 34 | 156 | 160 | -0.64% | 4 | 36 | Township |
| Wellington | 35 | 152 | 156 | -0.65% | 4 | 36 | Township |
| Norfolk | 36 | 143 | 147 | -0.69% | 4 | 36 | Township |
| Brookfield | 37 | 138 | 142 | -0.72% | 4 | 36 | Township |
| Osceola | 38 | 129 | 129 | 0.78% | 4 | 36 | Township |
| Bandon | 39 | 127 | 129 | 0% | 3 | 37 | Township |
Franklin is the largest city in Renville County, with a population of 2,945.
Bandon is the smallest city in Renville County, with a population of 127.
There are 39 cities in Renville County, Minnesota.