Identifiers: city · CDP · village
| Rank | Community | Population |
|---|---|---|
| 1 | Ithaca (city), NY | 32,108 |
| 2 | South Hill (CDP), NY | 7,245 |
| 3 | Cayuga Heights (village), NY | 4,114 |
| 4 | Lansing (village), NY | 3,648 |
| 5 | East Ithaca (CDP), NY | 3,175 |
| 6 | Northeast Ithaca (CDP), NY | 2,701 |
| 7 | Northwest Ithaca (CDP), NY | 2,231 |
| 8 | Groton (village), NY | 2,145 |
| 9 | Dryden (village), NY | 1,887 |
| 10 | Trumansburg (village), NY | 1,714 |
| 11 | Montour Falls (village), NY | 1,635 |
| 12 | Forest Home (CDP), NY | 1,168 |
| 13 | South Lansing (CDP), NY | 1,078 |
| 14 | Varna (CDP), NY | 767 |
| 15 | Newfield (CDP), NY | 725 |
| 16 | Spencer (village), NY | 719 |
| 17 | Van Etten (CDP), NY | 601 |
| 18 | Interlaken (village), NY | 595 |
| 19 | Odessa (village), NY | 517 |
| 20 | Jacksonville (CDP), NY | 516 |