19 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Geneva | 1 | 2,119 | 2,143 | -0.19% | 902 | 2 | City |
| Exeter-Fairmont Consolidated | 2 | 1,242 | 1,281 | -0.8% | 17 | 72 | Township |
| Geneva | 3 | 1,214 | 1,228 | -0.16% | 34 | 36 | Township |
| Fairmont | 4 | 572 | 589 | -0.52% | 497 | 1 | Village |
| Exeter | 5 | 511 | 522 | -0.39% | 807 | 1 | Village |
| Bryant | 6 | 413 | 426 | -0.96% | 11 | 36 | Township |
| Shickley | 7 | 341 | 347 | -0.29% | 1,114 | 0 | Village |
| Glengary | 8 | 336 | 344 | -0.59% | 9 | 36 | Township |
| Milligan | 9 | 245 | 250 | -0.41% | 950 | 0 | Village |
| Grafton | 10 | 221 | 227 | -0.9% | 6 | 36 | Township |
| Ohiowa | 11 | 121 | 123 | 0% | 486 | 0 | Village |
| Belle Prairie | 12 | 111 | 115 | -0.89% | 3 | 36 | Township |
| Grafton | 13 | 110 | 110 | 0% | 315 | 0 | Village |
| Chelsea | 14 | 99 | 96 | 1.02% | 3 | 36 | Township |
| Hamilton | 15 | 95 | 96 | 0% | 3 | 36 | Township |
| West Blue | 16 | 68 | 71 | -1.45% | 2 | 36 | Township |
| Bennett | 17 | 66 | 69 | -1.49% | 2 | 36 | Township |
| Momence | 18 | 59 | 62 | -1.67% | 2 | 36 | Township |
| Strang | 19 | 31 | 33 | 0% | 250 | 0 | Village |
Geneva is the largest city in Fillmore County, with a population of 2,119.
Strang is the smallest city in Fillmore County, with a population of 31.
There are 19 cities in Fillmore County, Nebraska.