36 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Chatfield | 1 | 3,033 | 3,003 | 0.17% | 1,171 | 3 | City |
| Spring Valley | 2 | 2,439 | 2,457 | -0.12% | 825 | 3 | City |
| Rushford | 3 | 1,846 | 1,863 | -0.16% | 1,119 | 2 | City |
| Preston | 4 | 1,314 | 1,319 | -0.08% | 533 | 2 | City |
| Harmony | 5 | 1,022 | 1,046 | -0.39% | 917 | 1 | City |
| Rushford Village | 6 | 801 | 795 | 0.13% | 24 | 34 | City |
| Lanesboro | 7 | 706 | 724 | -0.42% | 466 | 2 | City |
| Mabel | 8 | 699 | 717 | -0.43% | 1,453 | 0 | City |
| Canton | 9 | 677 | 654 | 0.15% | 19 | 35 | Township |
| Spring Valley | 10 | 561 | 543 | 0.18% | 18 | 32 | Township |
| Chatfield | 11 | 548 | 526 | 0.37% | 16 | 34 | Township |
| Fillmore | 12 | 504 | 485 | 0.2% | 14 | 35 | Township |
| Sumner | 13 | 501 | 487 | 0% | 13 | 38 | Township |
| Newburg | 14 | 452 | 434 | 0.44% | 13 | 35 | Township |
| Bristol | 15 | 437 | 418 | 0.46% | 12 | 36 | Township |
| Amherst | 16 | 429 | 409 | 0.47% | 12 | 36 | Township |
| Wykoff | 17 | 429 | 431 | 0% | 460 | 1 | City |
| Harmony | 18 | 409 | 387 | 0.74% | 12 | 35 | Township |
| Fountain | 19 | 405 | 408 | 0% | 407 | 1 | City |
| Carrolton | 20 | 391 | 372 | 0.77% | 10 | 38 | Township |
| Preston | 21 | 389 | 370 | 0.78% | 11 | 35 | Township |
| Pilot Mound | 22 | 386 | 375 | 0% | 11 | 34 | Township |
| York | 23 | 382 | 365 | 0.53% | 11 | 36 | Township |
| Norway | 24 | 381 | 368 | 0% | 11 | 36 | Township |
| Forestville | 25 | 377 | 365 | 0% | 10 | 36 | Township |
| Bloomfield | 26 | 337 | 324 | 0.3% | 9 | 36 | Township |
| Fountain | 27 | 317 | 300 | 0.63% | 9 | 35 | Township |
| Arendahl | 28 | 316 | 306 | 0% | 9 | 36 | Township |
| Canton | 29 | 313 | 312 | 0% | 304 | 1 | City |
| Carimona | 30 | 294 | 284 | 0% | 8 | 36 | Township |
| Holt | 31 | 243 | 236 | 0% | 7 | 32 | Township |
| Peterson | 32 | 224 | 232 | -0.44% | 472 | 0 | City |
| Ostrander | 33 | 223 | 231 | -0.45% | 469 | 0 | City |
| Beaver | 34 | 221 | 211 | 0.45% | 6 | 36 | Township |
| Preble | 35 | 215 | 208 | 0% | 6 | 36 | Township |
| Whalan | 36 | 70 | 66 | 1.45% | 163 | 0 | City |
Chatfield is the largest city in Fillmore County, with a population of 3,033.
Whalan is the smallest city in Fillmore County, with a population of 70.
There are 36 cities in Fillmore County, Minnesota.