| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Mahoning | 1 | 4,453 | 4,570 | -0.36% | 521 | 9 | Township |
| Danville | 2 | 4,075 | 4,222 | -0.63% | 2,621 | 2 | Borough |
| Valley | 3 | 2,096 | 2,157 | -0.52% | 129 | 16 | Township |
| Anthony | 4 | 1,476 | 1,450 | 0.27% | 57 | 26 | Township |
| Cooper | 5 | 928 | 943 | -0.22% | 135 | 7 | Township |
| West Hemlock | 6 | 465 | 454 | 1.53% | 60 | 8 | Township |
| Mayberry | 7 | 235 | 233 | -0.42% | 33 | 7 | Township |
| Washingtonville | 8 | 206 | 202 | 0% | 3,815 | 0 | Borough |
Mahoning is the largest city in Montour County, with a population of 4,453.
Washingtonville is the smallest city in Montour County, with a population of 206.
There are 8 cities in Montour County, Pennsylvania.