| Zip Code | City | Population ↓ |
|---|---|---|
| 11550 | Hempstead | 60,960 |
| 11758 | Massapequa | 54,375 |
| 11590 | Westbury | 47,599 |
| 11003 | Elmont | 45,174 |
| 11520 | Freeport | 44,910 |
| 11580 | Valley Stream | 43,092 |
| 11756 | Levittown | 42,665 |
| 11040 | New Hyde Park | 41,988 |
| 11801 | Hicksville | 41,585 |
| 11561 | Long Beach | 38,708 |
| 11554 | East Meadow | 36,821 |
| 11510 | Baldwin | 35,701 |
| 11710 | Bellmore | 34,834 |
| 11566 | Merrick | 34,741 |
| 11050 | Port Washington | 32,794 |
| 11793 | Wantagh | 32,349 |
| 11572 | Oceanside | 30,436 |
| 11803 | Plainview | 29,713 |
| 11542 | Glen Cove | 28,965 |
| 11570 | Rockville Centre | 28,908 |
| 11530 | Garden City | 27,939 |
| 11553 | Uniondale | 27,875 |
| 11010 | Franklin Square | 25,604 |
| 11791 | Syosset | 25,520 |
| 11001 | Floral Park | 25,493 |
| 11552 | West Hempstead | 25,174 |
| 11563 | Lynbrook | 22,899 |
| 11581 | Valley Stream | 22,818 |
| 11714 | Bethpage | 22,695 |
| 11762 | Massapequa Park | 22,487 |
| 11501 | Mineola | 21,641 |
| 11783 | Seaford | 21,127 |
| 11021 | Great Neck | 19,783 |
| 11575 | Roosevelt | 18,705 |
| 11030 | Manhasset | 18,051 |
| 11598 | Woodmere | 13,599 |
| 11577 | Roslyn Heights | 13,077 |
| 11753 | Jericho | 12,435 |
| 11576 | Roslyn | 12,281 |
| 11545 | Glen Head | 12,172 |
| 11771 | Oyster Bay | 10,908 |
| 11596 | Williston Park | 10,516 |
| 11096 | Inwood | 10,428 |
| 11518 | East Rockaway | 10,149 |
| 11023 | Great Neck | 9,630 |
| 11797 | Woodbury | 9,402 |
| 11024 | Great Neck | 9,155 |
| 11516 | Cedarhurst | 9,112 |
| 11565 | Malverne | 9,009 |
| 11559 | Lawrence | 8,878 |
| 11557 | Hewlett | 8,504 |
| 11558 | Island Park | 8,454 |
| 11560 | Locust Valley | 7,696 |
| 11709 | Bayville | 6,744 |
| 11507 | Albertson | 6,736 |
| 11020 | Great Neck | 5,676 |
| 11579 | Sea Cliff | 5,033 |
| 11804 | Old Bethpage | 4,835 |
| 11514 | Carle Place | 4,544 |
| 11568 | Old Westbury | 4,144 |
| 11732 | East Norwich | 3,228 |
| 11549 | Hempstead | 2,359 |
| 11548 | Greenvale | 2,261 |
| 11509 | Atlantic Beach | 1,790 |
| 11569 | Point Lookout | 945 |
| 11547 | Glenwood Landing | 706 |
| 11765 | Mill Neck | 683 |
| 11042 | New Hyde Park | 141 |
| 11556 | Uniondale | 0 |
The data shown reflect ZCTAs from the US Census. As of 2025, there are 69 ZCTAs in Nassau County, New York (US Census).