8 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Geneva | 1 | 2,119 | 2,143 | -0.19% | 902 | 2 | City |
| Fairmont | 2 | 572 | 589 | -0.52% | 497 | 1 | Village |
| Exeter | 3 | 511 | 522 | -0.39% | 807 | 1 | Village |
| Shickley | 4 | 341 | 347 | -0.29% | 1,114 | 0 | Village |
| Milligan | 5 | 245 | 250 | -0.41% | 950 | 0 | Village |
| Ohiowa | 6 | 121 | 123 | 0% | 486 | 0 | Village |
| Grafton | 7 | 110 | 110 | 0% | 315 | 0 | Village |
| Strang | 8 | 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 8 cities in Fillmore County, Nebraska.