59 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Delhi | 1 | 5,373 | 4,791 | -0.06% | 84 | 64 | Town |
| Delhi | 2 | 5,373 | 4,782 | -0.06% | 84 | 64 | Town |
| Sidney | 3 | 5,357 | 5,536 | -0.94% | 107 | 50 | Town |
| Sidney | 4 | 5,357 | 5,526 | -0.94% | 107 | 50 | Town |
| Walton | 5 | 5,088 | 5,268 | -1.01% | 53 | 97 | Town |
| Walton | 6 | 5,088 | 5,258 | -1.01% | 53 | 97 | Town |
| Sidney | 7 | 3,590 | 3,712 | -0.64% | 1,508 | 2 | Village |
| Sidney | 8 | 3,590 | 3,705 | -0.64% | 1,508 | 2 | Village |
| Delhi | 9 | 3,507 | 2,787 | 4.31% | 1,104 | 3 | Village |
| Delhi | 10 | 3,507 | 2,779 | 4.31% | 1,104 | 3 | Village |
| Davenport | 11 | 2,904 | 2,949 | -0.58% | 56 | 52 | Town |
| Davenport | 12 | 2,904 | 2,943 | -0.58% | 56 | 52 | Town |
| Walton | 13 | 2,826 | 2,920 | -0.63% | 1,833 | 2 | Village |
| Walton | 14 | 2,826 | 2,914 | -0.63% | 1,833 | 2 | Village |
| Hancock | 15 | 2,702 | 2,763 | -0.77% | 17 | 159 | Town |
| Hancock | 16 | 2,702 | 2,757 | -0.77% | 17 | 159 | Town |
| Franklin | 17 | 2,244 | 2,288 | -0.66% | 28 | 81 | Town |
| Franklin | 18 | 2,244 | 2,285 | -0.66% | 28 | 81 | Town |
| Roxbury | 19 | 2,198 | 2,248 | -0.9% | 25 | 87 | Town |
| Roxbury | 20 | 2,198 | 2,245 | -0.9% | 25 | 87 | Town |
| West End | 21 | 2,193 | 2,199 | 0.78% | 600 | 4 | CDP |
| Stamford | 22 | 1,968 | 2,000 | -0.51% | 41 | 49 | Town |
| Stamford | 23 | 1,968 | 1,995 | -0.51% | 41 | 49 | Town |
| Colchester | 24 | 1,750 | 1,786 | -0.79% | 13 | 137 | Town |
| Colchester | 25 | 1,750 | 1,775 | -0.79% | 13 | 137 | Town |
| Kortright | 26 | 1,495 | 1,544 | -1.06% | 24 | 62 | Town |
| Kortright | 27 | 1,495 | 1,543 | -1.06% | 24 | 62 | Town |
| Meredith | 28 | 1,481 | 1,489 | -0.67% | 25 | 58 | Town |
| Meredith | 29 | 1,481 | 1,488 | -0.67% | 25 | 58 | Town |
| Harpersfield | 30 | 1,401 | 1,446 | -0.99% | 33 | 42 | Town |
| Harpersfield | 31 | 1,401 | 1,448 | -0.99% | 33 | 42 | Town |
| Tompkins | 32 | 1,246 | 1,290 | -1.03% | 13 | 98 | Town |
| Tompkins | 33 | 1,246 | 1,289 | -1.03% | 13 | 98 | Town |
| Masonville | 34 | 1,217 | 1,240 | -0.81% | 22 | 54 | Town |
| Masonville | 35 | 1,217 | 1,239 | -0.81% | 22 | 54 | Town |
| Franklin | 36 | 1,142 | 1,146 | -0.09% | 7 | 170 | Town |
| Franklin | 37 | 1,142 | 1,146 | -0.09% | 7 | 170 | Town |
| Hamden | 38 | 1,111 | 1,134 | -0.63% | 19 | 60 | Town |
| Hamden | 39 | 1,111 | 1,133 | -0.63% | 19 | 60 | Town |
| Andes | 40 | 1,085 | 1,119 | -1% | 10 | 109 | Town |
| Andes | 41 | 1,085 | 1,117 | -1% | 10 | 109 | Town |
| Stamford | 42 | 1,058 | 1,088 | -0.56% | 794 | 1 | Village |
| Stamford | 43 | 1,058 | 1,085 | -0.56% | 794 | 1 | Village |
| Hancock | 44 | 884 | 916 | -0.67% | 564 | 2 | Village |
| Hancock | 45 | 884 | 914 | -0.67% | 564 | 2 | Village |
| Bovina | 46 | 633 | 658 | -1.09% | 14 | 44 | Town |
| Bovina | 47 | 633 | 657 | -1.09% | 14 | 44 | Town |
| Davenport Center | 48 | 524 | 263 | 2.34% | 169 | 3 | CDP |
| Margaretville | 49 | 482 | 533 | -2.03% | 693 | 1 | Village |
| Margaretville | 50 | 482 | 529 | -2.03% | 693 | 1 | Village |
| Hobart | 51 | 384 | 399 | -0.78% | 771 | 0 | Village |
| Hobart | 52 | 384 | 398 | -0.78% | 771 | 0 | Village |
| Bloomville | 53 | 309 | 218 | 1.98% | 235 | 1 | CDP |
| Franklin | 54 | 271 | 281 | -0.73% | 799 | 0 | Village |
| Franklin | 55 | 271 | 280 | -0.73% | 799 | 0 | Village |
| Downsville | 56 | 239 | 405 | -9.81% | 54 | 4 | CDP |
| Fleischmanns | 57 | 224 | 233 | -0.88% | 342 | 1 | Village |
| Fleischmanns | 58 | 224 | 233 | -0.88% | 342 | 1 | Village |
| Andes | 59 | 81 | 199 | -11.96% | 58 | 1 | CDP |
Delhi is the largest city in Delaware County, with a population of 5,373.
Andes is the smallest city in Delaware County, with a population of 81.
There are 59 cities in Delaware County, New York.