11 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Rochester | 1 | 9,802 | 10,218 | -1.62% | 119 | 83 | Township |
| Rochester | 2 | 6,069 | 6,272 | -0.67% | 1,327 | 5 | City |
| Henry | 3 | 2,943 | 3,060 | -1.54% | 63 | 46 | Township |
| Newcastle | 4 | 1,336 | 1,369 | -1.33% | 40 | 33 | Township |
| Aubbeenaubbee | 5 | 1,314 | 1,352 | -1.5% | 38 | 35 | Township |
| Union | 6 | 1,228 | 1,282 | -1.68% | 30 | 41 | Township |
| Akron | 7 | 1,082 | 1,124 | -0.82% | 2,357 | 0 | Town |
| Fulton | 8 | 607 | 586 | 1.17% | 20 | 30 | Township |
| Kewanna | 9 | 555 | 577 | -0.89% | 1,013 | 1 | Town |
| Wayne | 10 | 520 | 540 | -1.33% | 11 | 47 | Township |
| Fulton | 11 | 288 | 298 | -0.69% | 1,548 | 0 | Town |
Rochester is the largest city in Fulton County, with a population of 9,802.
Fulton is the smallest city in Fulton County, with a population of 288.
There are 11 cities in Fulton County, Indiana.