| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Wauseon | 1 | 7,404 | 7,560 | -0.35% | 1,392 | 5 | City |
| Archbold | 2 | 4,399 | 4,508 | -0.41% | 892 | 5 | Village |
| Swanton | 3 | 3,869 | 3,882 | 0.08% | 1,139 | 3 | Village |
| Delta | 4 | 3,288 | 3,324 | -0.09% | 822 | 4 | Village |
| Fayette | 5 | 1,273 | 1,304 | -0.39% | 1,307 | 1 | Village |
| Lyons | 6 | 577 | 598 | -0.69% | 815 | 1 | Village |
| Metamora | 7 | 544 | 564 | -0.73% | 666 | 1 | Village |
Wauseon is the largest city in Fulton County, with a population of 7,404.
Metamora is the smallest city in Fulton County, with a population of 544.
There are 7 cities in Fulton County, Ohio.