| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Kent | 1 | 12,875 | 12,894 | -0.16% | 318 | 41 | Town |
| Albion | 2 | 7,485 | 7,451 | -0.81% | 296 | 25 | Town |
| Ridgeway | 3 | 6,424 | 6,572 | -0.08% | 128 | 50 | Town |
| Albion | 4 | 5,893 | 5,654 | 0.86% | 2,018 | 3 | Village |
| Medina | 5 | 5,819 | 6,001 | -0.61% | 1,764 | 3 | Village |
| Shelby | 6 | 4,789 | 4,881 | -0.06% | 103 | 46 | Town |
| Murray | 7 | 4,744 | 4,819 | 0% | 153 | 31 | Town |
| Clarendon | 8 | 3,330 | 3,305 | 0.12% | 95 | 35 | Town |
| Gaines | 9 | 3,302 | 3,215 | 0.03% | 96 | 34 | Town |
| Carlton | 10 | 2,796 | 2,820 | 0.11% | 64 | 44 | Town |
| Kendall | 11 | 2,574 | 2,602 | -0.12% | 78 | 33 | Town |
| Yates | 12 | 2,524 | 2,552 | 0.16% | 68 | 37 | Town |
| Albion | 13 | 2,078 | 2,025 | 0.43% | 44 | 47 | Town |
| Barre | 14 | 1,796 | 1,830 | -0.06% | 33 | 55 | Town |
| Holley | 15 | 1,717 | 1,765 | -0.52% | 1,354 | 1 | Village |
| Lyndonville | 16 | 767 | 786 | -0.52% | 749 | 1 | Village |
Kent is the largest city in Orleans County, with a population of 12,875.
Lyndonville is the smallest city in Orleans County, with a population of 767.
There are 16 cities in Orleans County, New York.