| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Cherry | 1 | 1,483 | 1,478 | -0.74% | 26 | 58 | Township |
| Colley | 2 | 607 | 610 | -0.49% | 10 | 58 | Township |
| Davidson | 3 | 546 | 546 | -0.55% | 7.0 | 78 | Township |
| Dushore | 4 | 452 | 455 | 0% | 574 | 1 | Borough |
| Laporte | 5 | 419 | 408 | -0.24% | 8.0 | 54 | Township |
| Forks | 6 | 368 | 371 | -0.81% | 8.0 | 43 | Township |
| Laporte | 7 | 312 | 310 | 0% | 292 | 1 | Borough |
| Fox | 8 | 307 | 310 | -0.97% | 8.0 | 39 | Township |
| Hillsgrove | 9 | 227 | 228 | -0.87% | 8.0 | 29 | Township |
| Eagles Mere | 10 | 153 | 150 | 0% | 74 | 2 | Borough |
| Forksville | 11 | 108 | 109 | 0% | 69 | 2 | Borough |
Cherry is the largest city in Sullivan County, with a population of 1,483.
Forksville is the smallest city in Sullivan County, with a population of 108.
There are 11 cities in Sullivan County, Pennsylvania.