37 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Chatfield | 1 | 2,988 | 3,000 | -0.07% | 1,154 | 2.59 | City |
| Spring Valley | 2 | 2,460 | 2,457 | 0.04% | 832 | 2.96 | City |
| Rushford | 3 | 1,860 | 1,862 | 0% | 1,127 | 1.65 | City |
| Preston | 4 | 1,327 | 1,319 | 0.15% | 538 | 2.46 | City |
| Harmony | 5 | 1,036 | 1,050 | -0.29% | 929 | 1.11 | City |
| Rushford Village | 6 | 809 | 794 | 0.37% | 24 | 33.51 | City |
| Lanesboro | 7 | 716 | 726 | -0.28% | 473 | 1.51 | City |
| Mabel | 8 | 706 | 720 | -0.42% | 1,468 | 0.48 | City |
| Canton township | 9 | 684 | 654 | 0.74% | 20 | 34.99 | Township |
| Spring Valley township | 10 | 561 | 540 | 0.54% | 18 | 31.61 | Township |
| Chatfield township | 11 | 559 | 528 | 1.27% | 16 | 34.10 | Township |
| Fillmore township | 12 | 513 | 485 | 1.18% | 15 | 34.88 | Township |
| Sumner township | 13 | 513 | 487 | 1.18% | 14 | 37.53 | Township |
| Newburg township | 14 | 453 | 435 | 0.67% | 13 | 35.37 | Township |
| Bristol township | 15 | 433 | 418 | 0.23% | 12 | 36.02 | Township |
| Wykoff | 16 | 431 | 431 | 0% | 462 | 0.93 | City |
| Amherst township | 17 | 429 | 405 | 1.18% | 12 | 35.86 | Township |
| Fountain | 18 | 408 | 408 | 0% | 410 | 0.99 | City |
| Harmony township | 19 | 407 | 386 | 0.99% | 12 | 34.83 | Township |
| Pilot Mound township | 20 | 393 | 376 | 0.77% | 11 | 34.24 | Township |
| Carrolton township | 21 | 389 | 373 | 0.78% | 10 | 37.82 | Township |
| Norway township | 22 | 387 | 366 | 1.04% | 11 | 35.77 | Township |
| Forestville township | 23 | 383 | 365 | 0.79% | 11 | 36.09 | Township |
| Preston township | 24 | 383 | 369 | 0.52% | 11 | 34.52 | Township |
| York township | 25 | 381 | 366 | 0.53% | 11 | 36.12 | Township |
| Bloomfield township | 26 | 340 | 324 | 0.89% | 10 | 35.55 | Township |
| Arendahl township | 27 | 322 | 306 | 0.94% | 9 | 35.66 | Township |
| Fountain township | 28 | 321 | 300 | 1.26% | 9 | 34.68 | Township |
| Canton | 29 | 316 | 311 | 0.32% | 306 | 1.03 | City |
| Carimona township | 30 | 301 | 285 | 1.01% | 8 | 35.64 | Township |
| Holt township | 31 | 246 | 237 | 0.41% | 8 | 32.41 | Township |
| Peterson | 32 | 225 | 232 | -0.44% | 474 | 0.47 | City |
| Ostrander | 33 | 222 | 229 | -0.45% | 467 | 0.47 | City |
| Beaver township | 34 | 222 | 211 | 0.91% | 6 | 36.15 | Township |
| Preble township | 35 | 221 | 208 | 1.38% | 6 | 35.74 | Township |
| High Forest | 36 | 165 | 118 | 7.14% | 506 | 0.33 | CDP |
| Whalan | 37 | 72 | 66 | 1.41% | 167 | 0.43 | City |
Chatfield is the largest city in Fillmore County, with a population of 2,988.
Whalan is the smallest city in Fillmore County.
There are 37 cities in Fillmore County, Minnesota.