Identifiers: city · CDP · village
| Rank | Community | Population |
|---|---|---|
| 1 | Buffalo (city), NY | 278,349 |
| 2 | Cheektowaga (CDP), NY | 76,829 |
| 3 | Tonawanda Town (CDP), NY | 57,431 |
| 4 | West Seneca (CDP), NY | 45,500 |
| 5 | Lackawanna (city), NY | 19,949 |
| 6 | Eggertsville (CDP), NY | 15,561 |
| 7 | Kenmore (village), NY | 15,205 |
| 8 | Depew (village), NY | 15,178 |
| 9 | Lancaster (village), NY | 10,027 |
| 10 | Hamburg (village), NY | 9,696 |
| 11 | University at Buffalo (CDP), NY | 6,798 |
| 12 | East Aurora (village), NY | 5,998 |
| 13 | Harris Hill (CDP), NY | 5,839 |
| 14 | Williamsville (village), NY | 5,423 |
| 15 | Springville (village), NY | 4,225 |
| 16 | Sloan (village), NY | 3,775 |
| 17 | Highland-on-the-Lake (CDP), NY | 3,765 |
| 18 | Lake Erie Beach (CDP), NY | 3,467 |
| 19 | Eden (CDP), NY | 3,346 |
| 20 | Wanakah (CDP), NY | 3,137 |
Identifiers: city · CDP · village
| Rank | Community | Population |
|---|---|---|
| 1 | Buffalo (city), NY | 278,349 |
| 2 | Cheektowaga (CDP), NY | 76,829 |
| 3 | Tonawanda Town (CDP), NY | 57,431 |
| 4 | West Seneca (CDP), NY | 45,500 |
| 5 | North Tonawanda (city), NY | 30,496 |
| 6 | Lackawanna (city), NY | 19,949 |
| 7 | Eggertsville (CDP), NY | 15,561 |
| 8 | Kenmore (village), NY | 15,205 |
| 9 | Depew (village), NY | 15,178 |
| 10 | Tonawanda (city), NY | 15,129 |
| 11 | Lancaster (village), NY | 10,027 |
| 12 | Hamburg (village), NY | 9,696 |
| 13 | University at Buffalo (CDP), NY | 6,798 |
| 14 | East Aurora (village), NY | 5,998 |
| 15 | Harris Hill (CDP), NY | 5,839 |
| 16 | Williamsville (village), NY | 5,423 |
| 17 | Grandyle Village (CDP), NY | 4,805 |
| 18 | Springville (village), NY | 4,225 |
| 19 | Sloan (village), NY | 3,775 |
| 20 | Highland-on-the-Lake (CDP), NY | 3,765 |