11 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Rochester | 1 | 9,641 | 10,218 | -1.64% | 117 | 83 | Township |
| Rochester | 2 | 6,029 | 6,272 | -0.66% | 1,319 | 5 | City |
| Henry | 3 | 2,897 | 3,060 | -1.56% | 62 | 46 | Township |
| Newcastle | 4 | 1,318 | 1,369 | -1.35% | 40 | 33 | Township |
| Aubbeenaubbee | 5 | 1,294 | 1,352 | -1.52% | 38 | 35 | Township |
| Union | 6 | 1,207 | 1,282 | -1.71% | 30 | 41 | Township |
| Akron | 7 | 1,074 | 1,124 | -0.74% | 2,000 | 1 | Town |
| Fulton | 8 | 614 | 586 | 1.15% | 20 | 30 | Township |
| Kewanna | 9 | 551 | 577 | -0.72% | 1,005 | 1 | Town |
| Wayne | 10 | 513 | 540 | -1.35% | 11 | 47 | Township |
| Fulton | 11 | 286 | 298 | -0.69% | 1,538 | 0 | Town |
Rochester is the largest city in Fulton County, with a population of 9,641.
Fulton is the smallest city in Fulton County, with a population of 286.
There are 11 cities in Fulton County, Indiana.