16 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Elmira | 1 | 26,226 | 26,312 | -0.05% | 3,616 | 7 | City |
| Horseheads | 2 | 18,438 | 19,295 | -0.32% | 518 | 36 | Town |
| Southport | 3 | 8,727 | 9,577 | -0.65% | 188 | 46 | Town |
| Big Flats | 4 | 7,394 | 7,769 | -0.54% | 166 | 44 | Town |
| Elmira | 5 | 6,471 | 6,828 | -0.6% | 291 | 22 | Town |
| Horseheads | 6 | 6,218 | 6,592 | -0.99% | 1,597 | 4 | Village |
| Elmira Heights | 7 | 3,680 | 3,931 | -1.13% | 3,211 | 1 | Village |
| Veteran | 8 | 3,207 | 3,344 | -0.28% | 84 | 38 | Town |
| Catlin | 9 | 2,441 | 2,547 | -0.45% | 64 | 38 | Town |
| Chemung | 10 | 2,277 | 2,351 | -0.18% | 46 | 49 | Town |
| Erin | 11 | 1,745 | 1,806 | -0.23% | 39 | 44 | Town |
| Van Etten | 12 | 1,470 | 1,532 | -0.54% | 35 | 41 | Town |
| South Corning | 13 | 1,060 | 1,099 | -0.56% | 1,718 | 1 | Village |
| Wellsburg | 14 | 473 | 499 | -0.84% | 833 | 1 | Village |
| Riverside | 15 | 415 | 436 | -0.72% | 1,379 | 0 | Village |
| Millport | 16 | 268 | 289 | -1.11% | 770 | 0 | Village |
Elmira is the largest city in Chemung County, with a population of 26,226.
Millport is the smallest city in Chemung County, with a population of 268.
There are 16 cities in Chemung County, New York.