11 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Rochester township | 1 | 10,126 | 10,220 | -0.11% | 123 | 82.57 | Township |
| Rochester | 2 | 6,172 | 6,269 | -0.31% | 1,350 | 4.57 | City |
| Henry township | 3 | 3,045 | 3,060 | -0.03% | 66 | 46.45 | Township |
| Aubbeenaubbee township | 4 | 1,367 | 1,354 | 0.29% | 40 | 34.50 | Township |
| Newcastle township | 5 | 1,366 | 1,367 | 0.15% | 41 | 33.18 | Township |
| Union township | 6 | 1,267 | 1,280 | -0.16% | 31 | 40.55 | Township |
| Akron | 7 | 1,105 | 1,124 | -0.36% | 2,407 | 0.46 | Town |
| Fulton township | 8 | 598 | 584 | 0.67% | 20 | 30.36 | Township |
| Kewanna | 9 | 567 | 577 | -0.35% | 1,035 | 0.55 | Town |
| Wayne township | 10 | 532 | 541 | -0.19% | 11 | 46.74 | Township |
| Fulton | 11 | 297 | 301 | -0.34% | 1,597 | 0.19 | Town |
Rochester township is the largest city in Fulton County, with a population of 10,126.
Fulton is the smallest city in Fulton County.
There are 11 cities in Fulton County, Indiana.