Identifiers: CDP · village · city
| Rank | Community | Population |
|---|---|---|
| 1 | Brentwood (CDP), NY | 62,387 |
| 2 | Hempstead (village), NY | 59,169 |
| 3 | Levittown (CDP), NY | 51,758 |
| 4 | Freeport (village), NY | 44,472 |
| 5 | Hicksville (CDP), NY | 43,869 |
| 6 | West Babylon (CDP), NY | 43,213 |
| 7 | Valley Stream (village), NY | 40,634 |
| 8 | East Meadow (CDP), NY | 37,796 |
| 9 | Central Islip (CDP), NY | 36,714 |
| 10 | Commack (CDP), NY | 36,536 |
| 11 | Elmont (CDP), NY | 35,265 |
| 12 | Long Beach (city), NY | 35,029 |
| 13 | Huntington Station (CDP), NY | 34,878 |
| 14 | Baldwin (CDP), NY | 33,919 |
| 15 | Oceanside (CDP), NY | 32,637 |
| 16 | Uniondale (CDP), NY | 32,473 |
| 17 | Franklin Square (CDP), NY | 30,903 |
| 18 | Bay Shore (CDP), NY | 29,244 |
| 19 | Deer Park (CDP), NY | 28,837 |
| 20 | Lindenhurst (village), NY | 27,148 |