| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Oneonta | 1 | 16,323 | 13,069 | 4.2% | 3,743 | 4 | City |
| Oneonta | 2 | 4,947 | 5,058 | -0.28% | 150 | 33 | Town |
| Unadilla | 3 | 4,103 | 4,108 | 0.12% | 89 | 46 | Town |
| Otsego | 4 | 3,623 | 3,634 | 0.06% | 67 | 54 | Town |
| Milford | 5 | 2,743 | 2,807 | -0.18% | 59 | 46 | Town |
| Otego | 6 | 2,685 | 2,751 | -0.33% | 59 | 46 | Town |
| Laurens | 7 | 2,304 | 2,305 | 0.13% | 55 | 42 | Town |
| Richfield | 8 | 2,054 | 2,061 | 0.1% | 67 | 31 | Town |
| Worcester | 9 | 2,046 | 2,104 | -0.39% | 44 | 47 | Town |
| Hartwick | 10 | 1,942 | 1,947 | 0.1% | 48 | 40 | Town |
| Edmeston | 11 | 1,893 | 1,901 | 0.05% | 43 | 44 | Town |
| Middlefield | 12 | 1,874 | 1,881 | 0.21% | 30 | 63 | Town |
| Cooperstown | 13 | 1,836 | 1,854 | -0.22% | 1,123 | 2 | Village |
| Maryland | 14 | 1,745 | 1,749 | 0.11% | 33 | 52 | Town |
| Morris | 15 | 1,721 | 1,729 | 0.06% | 44 | 39 | Town |
| Butternuts | 16 | 1,651 | 1,655 | 0.12% | 31 | 54 | Town |
| Springfield | 17 | 1,326 | 1,332 | 0.08% | 31 | 43 | Town |
| Pittsfield | 18 | 1,305 | 1,307 | 0.08% | 34 | 38 | Town |
| Cherry Valley | 19 | 1,222 | 1,232 | -0.08% | 30 | 40 | Town |
| Richfield Springs | 20 | 1,090 | 1,099 | -0.18% | 1,082 | 1 | Village |
| Unadilla | 21 | 1,089 | 1,097 | -0.18% | 1,050 | 1 | Village |
| New Lisbon | 22 | 1,088 | 1,082 | 0.37% | 25 | 44 | Town |
| Burlington | 23 | 1,038 | 1,040 | 0.1% | 23 | 45 | Town |
| Plainfield | 24 | 923 | 923 | 0.22% | 31 | 30 | Town |
| Otego | 25 | 896 | 934 | -0.78% | 773 | 1 | Village |
| Exeter | 26 | 838 | 842 | 0% | 26 | 32 | Town |
| Westford | 27 | 818 | 817 | 0.12% | 24 | 34 | Town |
| Roseboom | 28 | 660 | 685 | -0.45% | 20 | 33 | Town |
| Morris | 29 | 511 | 518 | -0.39% | 685 | 1 | Village |
| Cherry Valley | 30 | 476 | 480 | -0.21% | 933 | 1 | Village |
| Milford | 31 | 386 | 389 | -0.26% | 910 | 0 | Village |
| Decatur | 32 | 369 | 370 | 0% | 18 | 21 | Town |
| Gilbertsville | 33 | 325 | 328 | -0.31% | 324 | 1 | Village |
| Laurens | 34 | 215 | 217 | -0.46% | 1,680 | 0 | Village |
Oneonta is the largest city in Otsego County, with a population of 16,323.
Laurens is the smallest city in Otsego County, with a population of 215.
There are 34 cities in Otsego County, New York.