20 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Queensbury town | 1 | 29,068 | 29,110 | -0.22% | 466 | 62.35 | Town |
| Glens Falls | 2 | 14,322 | 14,784 | -0.64% | 3,719 | 3.85 | City |
| West Glens Falls | 3 | 10,189 | 8,534 | 2.08% | 1,533 | 6.65 | CDP |
| Glens Falls North | 4 | 9,134 | 8,753 | 0.51% | 1,090 | 8.38 | CDP |
| Warrensburg town | 5 | 3,968 | 3,956 | 0.3% | 63 | 63.49 | Town |
| Lake George town | 6 | 3,513 | 3,498 | 0.34% | 118 | 29.80 | Town |
| Warrensburg | 7 | 3,358 | 3,209 | 0.51% | 497 | 6.76 | CDP |
| Lake Luzerne town | 8 | 3,106 | 3,074 | 0.45% | 59 | 52.92 | Town |
| Johnsburg town | 9 | 2,173 | 2,142 | 0.84% | 11 | 204.23 | Town |
| Bolton town | 10 | 2,019 | 2,010 | 0.35% | 32 | 63.60 | Town |
| Lake Luzerne | 11 | 1,692 | 1,416 | 7.09% | 406 | 4.17 | CDP |
| Horicon town | 12 | 1,475 | 1,466 | 0.41% | 22 | 65.77 | Town |
| Thurman town | 13 | 1,100 | 1,093 | 0.36% | 12 | 91.09 | Town |
| Lake George | 14 | 1,003 | 1,007 | -0.1% | 1,712 | 0.59 | Village |
| Stony Creek town | 15 | 765 | 760 | 0.39% | 9 | 82.16 | Town |
| Hague town | 16 | 635 | 633 | 0.32% | 10 | 63.76 | Town |
| Chestertown | 17 | 528 | 707 | -1.86% | 137 | 3.84 | CDP |
| North Creek | 18 | 528 | 691 | -1.12% | 300 | 1.76 | CDP |
| Bolton Landing | 19 | 278 | 418 | -5.44% | 180 | 1.54 | CDP |
| Pottersville | 20 | 80 | 182 | -22.33% | 35 | 2.28 | CDP |
Queensbury town is the largest city in Warren County, with a population of 29,068.
Pottersville is the smallest city in Warren County.
There are 20 cities in Warren County, New York.