20 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Albany | 1 | 102,925 | 98,682 | 0.83% | 4,809 | 21.40 | City |
| Colonie | 2 | 85,889 | 85,383 | 0.17% | 1,535 | 55.96 | Town |
| Troy | 3 | 50,133 | 51,318 | -0.47% | 4,840 | 10.36 | City |
| Guilderland | 4 | 36,714 | 36,772 | -0.35% | 634 | 57.90 | Town |
| Bethlehem | 5 | 35,072 | 35,057 | 0.15% | 715 | 49.03 | Town |
| Cohoes | 6 | 18,270 | 18,109 | 0.18% | 4,842 | 3.77 | City |
| Watervliet | 7 | 10,045 | 10,357 | -0.61% | 7,485 | 1.34 | City |
| New Scotland | 8 | 9,168 | 9,086 | 0.35% | 159 | 57.50 | Town |
| Colonie | 9 | 7,529 | 7,761 | -0.61% | 2,322 | 3.24 | Village |
| Coeymans | 10 | 7,180 | 7,253 | -0.03% | 143 | 50.18 | Town |
| Menands | 11 | 4,405 | 4,544 | -0.63% | 1,439 | 3.06 | Village |
| Westerlo | 12 | 3,213 | 3,186 | 0.25% | 56 | 57.79 | Town |
| Ravena | 13 | 3,177 | 3,267 | -0.56% | 2,164 | 1.47 | Village |
| Green Island | 14 | 2,919 | 2,989 | -0.48% | 3,908 | 0.75 | Village |
| Green Island | 15 | 2,917 | 2,989 | -0.51% | 3,905 | 0.75 | Town |
| Voorheesville | 16 | 2,780 | 2,839 | -0.43% | 1,300 | 2.14 | Village |
| Berne | 17 | 2,664 | 2,686 | -0.07% | 42 | 64.03 | Town |
| Knox | 18 | 2,581 | 2,632 | -0.27% | 62 | 41.76 | Town |
| Rensselaerville | 19 | 1,843 | 1,826 | 0.27% | 30 | 61.46 | Town |
| Altamont | 20 | 1,621 | 1,665 | -0.55% | 1,280 | 1.27 | Village |
Albany is the largest city in Albany County, with a population of 102,925.
Altamont is the smallest city in Albany County.
There are 20 cities in Albany County, New York.