7 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Jenks | 1 | 3,802 | 3,846 | 4.94% | 45 | 84 | Township |
| Marienville | 2 | 3,204 | 3,538 | 0.13% | 529 | 6 | CDP |
| Tionesta | 3 | 627 | 674 | -2.18% | 14 | 45 | Township |
| Tionesta | 4 | 399 | 426 | -1.48% | 290 | 1 | Borough |
| Green | 5 | 350 | 373 | -1.96% | 8 | 42 | Township |
| Barnett | 6 | 285 | 307 | -2.4% | 8 | 34 | Township |
| Howe | 7 | 192 | 201 | -1.54% | 2 | 88 | Township |
Jenks is the largest city in Forest County, with a population of 3,802.
Howe is the smallest city in Forest County, with a population of 192.
There are 7 cities in Forest County, Pennsylvania.