17 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Swan Creek | 1 | 8,442 | 8,521 | 0.09% | 201 | 42 | Township |
| Fayette | 2 | 8,076 | 8,493 | -0.54% | 294 | 27 | Township |
| Wauseon | 3 | 7,403 | 7,558 | -0.35% | 1,392 | 5 | City |
| German | 4 | 6,490 | 6,568 | 0.15% | 129 | 50 | Township |
| Archbold | 5 | 4,412 | 4,511 | -0.36% | 895 | 5 | Village |
| York | 6 | 4,161 | 4,255 | 0% | 99 | 42 | Township |
| Swanton | 7 | 3,883 | 3,889 | -0.03% | 1,143 | 3 | Village |
| Delta | 8 | 3,307 | 3,321 | -0.06% | 827 | 4 | Village |
| Swanton | 9 | 2,864 | 2,823 | 0.32% | 130 | 22 | Township |
| Gorham | 10 | 2,127 | 2,166 | -0.05% | 49 | 43 | Township |
| Amboy | 11 | 1,834 | 1,874 | 0% | 71 | 26 | Township |
| Pike | 12 | 1,717 | 1,747 | 0.06% | 61 | 28 | Township |
| Royalton | 13 | 1,478 | 1,505 | 0.14% | 60 | 25 | Township |
| Fayette | 14 | 1,271 | 1,304 | -0.39% | 1,305 | 1 | Village |
| Chesterfield | 15 | 917 | 922 | 0.33% | 32 | 29 | Township |
| Lyons | 16 | 582 | 602 | -0.51% | 822 | 1 | Village |
| Metamora | 17 | 546 | 564 | -0.55% | 668 | 1 | Village |
Swan Creek is the largest city in Fulton County, with a population of 8,442.
Metamora is the smallest city in Fulton County, with a population of 546.
There are 17 cities in Fulton County, Ohio.