8 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Ayr | 1 | 1,988 | 2,033 | -0.4% | 43 | 46 | Township |
| Licking Creek | 2 | 1,589 | 1,577 | 0.06% | 36 | 45 | Township |
| Belfast | 3 | 1,326 | 1,359 | -0.6% | 26 | 50 | Township |
| McConnellsburg | 4 | 1,110 | 1,147 | -0.72% | 3,199 | 0 | Borough |
| Union | 5 | 745 | 745 | -0.67% | 24 | 30 | Township |
| Brush Creek | 6 | 724 | 739 | -0.41% | 13 | 54 | Township |
| Wells | 7 | 489 | 498 | 0% | 13 | 37 | Township |
| Needmore | 8 | 98 | 92 | -3.92% | 216 | 0 | CDP |
Ayr is the largest city in Fulton County, with a population of 1,988.
Needmore is the smallest city in Fulton County, with a population of 98.
There are 8 cities in Fulton County, Pennsylvania.