| ZIP Codes: | 82 ZIP Codes (69 Standard, 9 PO Box, 4 Unique) [See All] |
| Area Codes: | 347 / 363 / 516 / 631 / 718 / 929 / 934 |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 2:13:15 PM |
| Population: | 1,401,387 [See All] |
| FIPS: | 36059 |
| CBSA: | New York-Newark-Jersey City, NY-NJ |
| Land Area: | 288 sq mi |
| Water Area: | 24 sq mi |
| Coordinates: | 40.7300, -73.6123 |
| Quick Link: |
1,401,387 residents live across 82 ZIPs covering 288 sq mi, served by 63 distinct USPS-recognized cities.
Population moved from 1,362,931 to 1,401,387 from 2014 to 2024 — a +2.8% change. 40 ZIPs gained residents, 29 lost (and 1 held flat).
The county's wealthiest ZIP 11568 (Old Westbury, $250,001 median) and poorest ZIP 11550 (Hempstead, $92,677) are 6.4 miles apart — a 2.7× income gap across local geography.
Median home values vary 4.3× across this county — from $465,100 in 11550 (Hempstead) to $2,000,001 in 11568 (Old Westbury).
Density varies 30× across the county — from 488 people/sq mi in 11568 (Old Westbury) to 14,777 in 11550 (Hempstead).
Educational attainment ranges from 21.9% bachelor's+ in 11550 (Hempstead) to 84.4% in 11030 (Manhasset) — the breadth of educational profiles across the area.
Within New York, this is the #6 most populous of 62 counties and ranks #2 for median household income .
On the national stage, Nassau County is the #30 most populous US county , ranks #17 for income .
Hosts 4 single-entity Unique ZIPs: 11549Hofstra Univ ; 11555Uniondale ; 11815L I Power Authority ; and 11853Uhc Berdon .
Weighted by population, the typical household earns about $150,000 across the county — reflecting what a typical resident sees, not a simple ZIP average.
49.7% of adults age 25+ hold a bachelor's degree or higher (488,514 of 983,731 reporting).
69 Standard delivery, 9 PO Box only, 4 single-entity Unique ZIPs serve this county.
27 ZIPs in this county where more than 60% of adults 25+ hold a bachelor's degree — typically college campuses, research enclaves, or tech corridors.
4 ZIP codes in this county serve a single facility — typically theme parks, universities, large corporations, airports, or government complexes.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 11550 | Hempstead | Standard | 60,960 | $92,677 | 4.1 | 6.5% |
| 11758 | Massapequa | Standard | 54,375 | $154,110 | 8.8 | -2.7% |
| 11590 | Westbury | Standard | 47,599 | $152,960 | 6.7 | 3.5% |
| 11003 | Elmont | Standard | 45,174 | $124,115 | 4.1 | 0.6% |
| 11520 | Freeport | Standard | 44,910 | $121,748 | 6.1 | 2.9% |
| 11580 | Valley Stream | Standard | 43,092 | $137,402 | 3.9 | 3.8% |
| 11756 | Levittown | Standard | 42,665 | $146,019 | 5.5 | 0.8% |
| 11040 | New Hyde Park | Standard | 41,988 | $154,696 | 4.8 | 2.9% |
| 11801 | Hicksville | Standard | 41,585 | $145,788 | 6.7 | 4.5% |
| 11561 | Long Beach | Standard | 38,708 | $141,629 | 4.0 | 2.9% |
| 11554 | East Meadow | Standard | 36,821 | $133,971 | 6.4 | -1.8% |
| 11510 | Baldwin | Standard | 35,701 | $147,319 | 4.2 | 6.8% |
| 11710 | Bellmore | Standard | 34,834 | $173,054 | 5.0 | -0.9% |
| 11566 | Merrick | Standard | 34,741 | $177,079 | 5.6 | 2.8% |
| 11050 | Port Washington | Standard | 32,794 | $154,225 | 10.2 | 7.2% |
| 11793 | Wantagh | Standard | 32,349 | $167,068 | 10.9 | -1.1% |
| 11735 | Farmingdale | Standard | 32,028 | $139,443 | 11.5 | -1.4% |
| 11572 | Oceanside | Standard | 30,436 | $148,790 | 4.9 | 5.3% |
| 11803 | Plainview | Standard | 29,713 | $187,514 | 6.1 | 4.5% |
| 11542 | Glen Cove | Standard | 28,965 | $93,242 | 7.0 | 4.6% |
| 11570 | Rockville Centre | Standard | 28,908 | $157,163 | 4.0 | 3.6% |
| 11530 | Garden City | Standard | 27,939 | $228,143 | 7.1 | -0.8% |
| 11553 | Uniondale | Standard | 27,875 | $121,127 | 3.2 | 5.2% |
| 11010 | Franklin Square | Standard | 25,604 | $142,321 | 2.4 | 2.2% |
| 11791 | Syosset | Standard | 25,520 | $202,962 | 12.5 | 1.2% |
| 11001 | Floral Park | Standard | 25,493 | $150,000 | 2.3 | -6.1% |
| 11552 | West Hempstead | Standard | 25,174 | $155,154 | 3.6 | 9.7% |
| 11563 | Lynbrook | Standard | 22,899 | $136,887 | 2.3 | -0.4% |
| 11581 | Valley Stream | Standard | 22,818 | $142,233 | 2.6 | 8.9% |
| 11714 | Bethpage | Standard | 22,695 | $120,172 | 4.3 | -2.7% |
| 11762 | Massapequa Park | Standard | 22,487 | $169,624 | 3.5 | -2.5% |
| 11501 | Mineola | Standard | 21,641 | $137,665 | 2.1 | 13.0% |
| 11783 | Seaford | Standard | 21,127 | $176,993 | 4.0 | -0.2% |
| 11021 | Great Neck | Standard | 19,783 | $120,230 | 2.7 | 13.2% |
| 11575 | Roosevelt | Standard | 18,705 | $126,146 | 1.8 | 12.2% |
| 11030 | Manhasset | Standard | 18,051 | $234,966 | 6.5 | 4.4% |
| 11598 | Woodmere | Standard | 13,599 | $190,074 | 2.1 | 5.2% |
| 11577 | Roslyn Heights | Standard | 13,077 | $182,674 | 3.0 | 2.3% |
| 11753 | Jericho | Standard | 12,435 | $175,781 | 4.0 | 6.7% |
| 11576 | Roslyn | Standard | 12,281 | $216,250 | 4.5 | -0.4% |
| 11545 | Glen Head | Standard | 12,172 | $182,528 | 12.0 | -3.8% |
| 11771 | Oyster Bay | Standard | 10,908 | $157,923 | 10.6 | 16.7% |
| 11596 | Williston Park | Standard | 10,516 | $163,833 | 1.3 | -1.1% |
| 11096 | Inwood | Standard | 10,428 | $93,421 | 1.4 | 32.3% |
| 11518 | East Rockaway | Standard | 10,149 | $117,052 | 1.4 | 0.8% |
| 11023 | Great Neck | Standard | 9,630 | $141,003 | 1.7 | -3.3% |
| 11797 | Woodbury | Standard | 9,402 | $192,609 | 5.3 | 8.8% |
| 11024 | Great Neck | Standard | 9,155 | $175,300 | 3.5 | 17.5% |
| 11516 | Cedarhurst | Standard | 9,112 | $104,331 | 0.9 | 21.3% |
| 11565 | Malverne | Standard | 9,009 | $148,049 | 1.1 | 2.1% |
| 11559 | Lawrence | Standard | 8,878 | $142,830 | 4.9 | 5.7% |
| 11557 | Hewlett | Standard | 8,504 | $176,274 | 2.1 | 15.5% |
| 11558 | Island Park | Standard | 8,454 | $111,032 | 1.8 | -2.2% |
| 11560 | Locust Valley | Standard | 7,696 | $163,750 | 7.9 | 21.5% |
| 11709 | Bayville | Standard | 6,744 | $149,191 | 1.5 | 0.3% |
| 11507 | Albertson | Standard | 6,736 | $164,028 | 1.1 | -6.8% |
| 11020 | Great Neck | Standard | 5,676 | $167,148 | 1.3 | -7.3% |
| 11579 | Sea Cliff | Standard | 5,033 | $193,590 | 1.1 | -5.7% |
| 11804 | Old Bethpage | Standard | 4,835 | $190,469 | 2.8 | -3.3% |
| 11514 | Carle Place | Standard | 4,544 | $151,964 | 1.0 | -12.6% |
| 11568 | Old Westbury | Standard | 4,144 | $250,001 | 8.5 | -2.3% |
| 11732 | East Norwich | Standard | 3,228 | $148,965 | 2.2 | -12.1% |
| 11549 | Hempstead | Unique | 2,359 | — | 0.2 | 0.9% |
| 11548 | Greenvale | Standard | 2,261 | $122,250 | 0.8 | -2.9% |
| 11509 | Atlantic Beach | Standard | 1,790 | $168,537 | 0.8 | -19.8% |
| 11569 | Point Lookout | PO Box | 945 | $81,635 | 1.8 | -26.4% |
| 11547 | Glenwood Landing | PO Box | 706 | $95,972 | 0.5 | -11.4% |
| 11765 | Mill Neck | Standard | 683 | $196,902 | 2.2 | -8.3% |
| 11042 | New Hyde Park | Standard | 141 | — | 0.9 | -74.0% |
| 11556 | Uniondale | Standard | 0 | — | 0.1 | — |
| 11555 | Uniondale | Unique | — | — | 0.0 | — |
| 11551 | Hempstead | PO Box | — | — | 0.0 | — |
| 11582 | Valley Stream | PO Box | — | — | 0.0 | — |
| 11571 | Rockville Centre | PO Box | — | — | 0.0 | — |
| 11815 | Hicksville | Unique | — | — | 0.0 | — |
| 11802 | Hicksville | PO Box | — | — | 0.0 | — |
| 11599 | Garden City | Standard | — | — | 0.0 | — |
| 11531 | Garden City | PO Box | — | — | 0.0 | — |
| 11002 | Floral Park | PO Box | — | — | 0.0 | — |
| 11737 | Farmingdale | Standard | — | — | 0.0 | — |
| 11022 | Great Neck | PO Box | — | — | 0.0 | — |
| 11853 | Jericho | Unique | — | — | 0.0 | — |