| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Union | 1 | 53,848 | 55,970 | -0.23% | 1,520 | 35 | Town |
| Binghamton | 2 | 46,115 | 47,740 | -0.65% | 4,401 | 10 | City |
| Vestal | 3 | 32,226 | 29,308 | 0.53% | 624 | 52 | Town |
| Johnson City | 4 | 14,457 | 15,150 | -0.84% | 3,176 | 5 | Village |
| Endicott | 5 | 12,943 | 13,642 | -0.96% | 4,052 | 3 | Village |
| Chenango | 6 | 10,557 | 10,967 | -0.35% | 312 | 34 | Town |
| Fenton | 7 | 6,177 | 6,407 | -0.47% | 188 | 33 | Town |
| Windsor | 8 | 5,649 | 5,783 | 0.02% | 62 | 92 | Town |
| Kirkwood | 9 | 5,250 | 5,475 | -0.46% | 171 | 31 | Town |
| Dickinson | 10 | 5,110 | 5,082 | 1.65% | 1,072 | 5 | Town |
| Maine | 11 | 4,981 | 5,163 | -0.4% | 109 | 46 | Town |
| Conklin | 12 | 4,801 | 4,994 | -0.46% | 196 | 24 | Town |
| Colesville | 13 | 4,718 | 4,860 | -0.25% | 60 | 78 | Town |
| Binghamton | 14 | 4,412 | 4,598 | -0.52% | 175 | 25 | Town |
| Triangle | 15 | 2,720 | 2,804 | -0.26% | 72 | 38 | Town |
| Lisle | 16 | 2,645 | 2,687 | 0.11% | 56 | 47 | Town |
| Sanford | 17 | 2,154 | 2,229 | -0.37% | 24 | 90 | Town |
| Port Dickinson | 18 | 1,639 | 1,722 | -0.91% | 2,614 | 1 | Village |
| Nanticoke | 19 | 1,565 | 1,572 | 0.06% | 64 | 24 | Town |
| Deposit | 20 | 1,395 | 1,423 | -0.14% | 32 | 43 | Town |
| Deposit | 21 | 1,393 | 1,454 | -0.78% | 1,103 | 1 | Village |
| Whitney Point | 22 | 893 | 931 | -0.78% | 856 | 1 | Village |
| Windsor | 23 | 849 | 891 | -0.93% | 773 | 1 | Village |
| Lisle | 24 | 320 | 336 | -0.93% | 342 | 1 | Village |
Union is the largest city in Broome County, with a population of 53,848.
Lisle is the smallest city in Broome County, with a population of 320.
There are 24 cities in Broome County, New York.