16 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Ithaca | 1 | 35,562 | 30,180 | 2.59% | 6,599 | 5 | City |
| Ithaca | 2 | 20,548 | 18,465 | -1.59% | 710 | 29 | Town |
| Dryden | 3 | 13,483 | 13,836 | 0.06% | 144 | 94 | Town |
| Lansing | 4 | 12,287 | 11,589 | 1.39% | 203 | 60 | Town |
| Groton | 5 | 5,523 | 5,702 | -0.14% | 112 | 49 | Town |
| Ulysses | 6 | 5,039 | 4,858 | 2.02% | 153 | 33 | Town |
| Newfield | 7 | 4,914 | 5,089 | -0.08% | 84 | 59 | Town |
| Lansing | 8 | 3,975 | 3,728 | 1.04% | 862 | 5 | Village |
| Cayuga Heights | 9 | 3,886 | 4,075 | -0.79% | 2,199 | 2 | Village |
| Danby | 10 | 3,372 | 3,399 | 0.36% | 63 | 54 | Town |
| Enfield | 11 | 3,312 | 3,343 | 0.3% | 90 | 37 | Town |
| Caroline | 12 | 3,274 | 3,317 | 0.15% | 60 | 55 | Town |
| Groton | 13 | 2,091 | 2,199 | -0.85% | 1,204 | 2 | Village |
| Dryden | 14 | 1,844 | 1,942 | -0.86% | 1,050 | 2 | Village |
| Trumansburg | 15 | 1,802 | 1,757 | 0.45% | 1,299 | 1 | Village |
| Freeville | 16 | 444 | 474 | -1.11% | 420 | 1 | Village |
Ithaca is the largest city in Tompkins County, with a population of 35,562.
Freeville is the smallest city in Tompkins County, with a population of 444.
There are 16 cities in Tompkins County, New York.