| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Geneva | 1 | 2,092 | 2,141 | -0.38% | 891 | 2 | City |
| Fairmont | 2 | 571 | 588 | -0.7% | 496 | 1 | Village |
| Exeter | 3 | 508 | 522 | -0.59% | 803 | 1 | Village |
| Shickley | 4 | 338 | 348 | -0.59% | 1,105 | 0 | Village |
| Milligan | 5 | 242 | 250 | -0.82% | 938 | 0 | Village |
| Ohiowa | 6 | 121 | 124 | -0.82% | 486 | 0 | Village |
| Grafton | 7 | 107 | 109 | -0.93% | 307 | 0 | Village |
| Strang | 8 | 32 | 34 | -3.03% | 258 | 0 | Village |
Geneva is the largest city in Fillmore County, with a population of 2,092.
Strang is the smallest city in Fillmore County, with a population of 32.
There are 8 cities in Fillmore County, Nebraska.