8 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Mahoning township | 1 | 4,337 | 4,549 | -1.36% | 507 | 8.55 | Township |
| Danville | 2 | 4,072 | 4,241 | -0.83% | 2,619 | 1.55 | Borough |
| Valley township | 3 | 2,073 | 2,157 | -1.05% | 128 | 16.20 | Township |
| Anthony township | 4 | 1,449 | 1,450 | -0.34% | 56 | 25.90 | Township |
| Cooper township | 5 | 893 | 946 | -1.87% | 130 | 6.87 | Township |
| West Hemlock township | 6 | 434 | 453 | -1.14% | 56 | 7.70 | Township |
| Mayberry township | 7 | 235 | 233 | 0% | 33 | 7.04 | Township |
| Washingtonville | 8 | 203 | 200 | 0.5% | 3,759 | 0.05 | Borough |
Mahoning township is the largest city in Montour County, with a population of 4,337.
Washingtonville is the smallest city in Montour County.
There are 8 cities in Montour County, Pennsylvania.