20 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Queensbury | 1 | 28,951 | 29,113 | -0.51% | 464 | 62 | Town |
| Glens Falls | 2 | 14,372 | 14,785 | -0.57% | 3,732 | 4 | City |
| West Glens Falls | 3 | 10,189 | 8,534 | 2.08% | 1,533 | 7 | CDP |
| Glens Falls North | 4 | 9,134 | 8,753 | 0.51% | 1,090 | 8 | CDP |
| Warrensburg | 5 | 3,964 | 3,958 | 0.1% | 62 | 63 | Town |
| Lake George | 6 | 3,494 | 3,495 | 0.03% | 117 | 30 | Town |
| Warrensburg | 7 | 3,358 | 3,209 | 0.51% | 497 | 7 | CDP |
| Lake Luzerne | 8 | 3,096 | 3,074 | 0.19% | 59 | 53 | Town |
| Johnsburg | 9 | 2,139 | 2,140 | -0.05% | 10 | 204 | Town |
| Bolton | 10 | 2,009 | 2,007 | 0.05% | 32 | 64 | Town |
| Lake Luzerne | 11 | 1,692 | 1,416 | 7.09% | 406 | 4 | CDP |
| Horicon | 12 | 1,467 | 1,466 | 0% | 22 | 66 | Town |
| Thurman | 13 | 1,096 | 1,094 | 0.18% | 12 | 91 | Town |
| Lake George | 14 | 1,006 | 1,008 | -0.1% | 1,717 | 1 | Village |
| Stony Creek | 15 | 761 | 760 | 0% | 9 | 82 | Town |
| Hague | 16 | 635 | 635 | 0% | 10 | 64 | Town |
| Chestertown | 17 | 528 | 707 | -1.86% | 137 | 4 | CDP |
| North Creek | 18 | 528 | 691 | -1.12% | 300 | 2 | CDP |
| Bolton Landing | 19 | 278 | 418 | -5.44% | 180 | 2 | CDP |
| Pottersville | 20 | 80 | 182 | -22.33% | 35 | 2 | CDP |
Queensbury is the largest city in Warren County, with a population of 28,951.
Pottersville is the smallest city in Warren County, with a population of 80.
There are 20 cities in Warren County, New York.