| ZIP Codes: | 114 ZIP Codes (89 Standard, 20 PO Box, 5 Unique) [See All] |
| Area Codes: | 363 / 516 / 631 / 934 |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 2:13:17 PM |
| Population: | 1,444,016 [See All] |
| FIPS: | 36103 |
| CBSA: | New York-Newark-Jersey City, NY-NJ |
| Land Area: | 918 sq mi |
| Water Area: | 213 sq mi |
| Coordinates: | 40.8611, -72.9188 |
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1,444,016 residents live across 114 ZIPs covering 918 sq mi, served by 106 distinct USPS-recognized cities.
Population moved from 1,419,173 to 1,444,016 from 2014 to 2024 — a +1.8% change. 54 ZIPs gained residents, 50 lost (and 1 held flat).
The county's wealthiest ZIP 11724 (Cold Spring Harbor, $250,001 median) and poorest ZIP 11933 (Calverton, $74,195) are 36.3 miles apart — a 3.4× income gap across local geography.
Median home values vary 5.6× across this county — from $355,400 in 11951 (Mastic Beach) to $2,000,001 in 11976 (Water Mill).
Density varies 48× across the county — from 171 people/sq mi in 11957 (Orient) to 8,141 in 11726 (Copiague).
Educational attainment ranges from 16.5% bachelor's+ in 11950 (Mastic) to 79.4% in 11724 (Cold Spring Harbor) — the breadth of educational profiles across the area.
Within New York, this is the #4 most populous of 62 counties and ranks #3 for median household income .
On the national stage, Suffolk County is the #28 most populous US county , ranks #42 for income .
Hosts 4 single-entity Unique ZIPs: 11794Suny Stony Brook ; 00501Internal Revenue Service ; 00544Internal Revenue Service ; and 11773Publishers Clearing House .
Weighted by population, the typical household earns about $134,673 across the county — reflecting what a typical resident sees, not a simple ZIP average.
41.4% of adults age 25+ hold a bachelor's degree or higher (421,149 of 1,017,712 reporting).
89 Standard delivery, 20 PO Box only, 5 single-entity Unique ZIPs serve this county.
12 ZIPs in this county where more than 60% of adults 25+ hold a bachelor's degree — typically college campuses, research enclaves, or tech corridors.
5 ZIP codes in this county serve a single facility — typically theme parks, universities, large corporations, airports, or government complexes.
Median household income spans 3.4× between the wealthiest and poorest ZIPs — a sign of significant intra-county inequality.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 11706 | Bay Shore | Standard | 68,976 | $119,603 | 14.4 | 4.7% |
| 11746 | Huntington Station | Standard | 65,747 | $164,589 | 23.5 | -4.1% |
| 11772 | Patchogue | Standard | 45,023 | $105,245 | 13.9 | -0.5% |
| 11757 | Lindenhurst | Standard | 44,413 | $127,889 | 6.8 | -1.1% |
| 11743 | Huntington | Standard | 43,490 | $183,187 | 25.9 | -0.1% |
| 11704 | West Babylon | Standard | 40,706 | $129,195 | 8.1 | 0.1% |
| 11722 | Central Islip | Standard | 39,033 | $114,049 | 6.9 | 5.0% |
| 11779 | Ronkonkoma | Standard | 38,206 | $112,180 | 12.9 | -1.4% |
| 11787 | Smithtown | Standard | 34,499 | $143,101 | 15.6 | -5.1% |
| 11901 | Riverhead | Standard | 33,091 | $85,061 | 54.5 | 8.0% |
| 11731 | East Northport | Standard | 29,999 | $161,132 | 8.4 | 3.6% |
| 11763 | Medford | Standard | 29,973 | $120,783 | 13.5 | 2.6% |
| 11701 | Amityville | Standard | 29,509 | $117,033 | 5.1 | 7.6% |
| 11720 | Centereach | Standard | 29,292 | $134,898 | 8.3 | -0.3% |
| 11725 | Commack | Standard | 29,073 | $168,281 | 9.8 | 1.5% |
| 11727 | Coram | Standard | 28,495 | $103,287 | 9.2 | -5.0% |
| 11967 | Shirley | Standard | 27,975 | $111,617 | 13.1 | 3.2% |
| 11729 | Deer Park | Standard | 27,231 | $136,939 | 6.4 | -0.6% |
| 11741 | Holbrook | Standard | 26,667 | $144,346 | 7.5 | -6.9% |
| 11784 | Selden | Standard | 26,244 | $104,369 | 5.6 | -0.3% |
| 11795 | West Islip | Standard | 25,379 | $177,269 | 6.4 | -0.6% |
| 11776 | Port Jefferson Station | Standard | 22,808 | $120,573 | 7.1 | -11.2% |
| 11768 | Northport | Standard | 22,030 | $172,570 | 14.6 | 1.6% |
| 11937 | East Hampton | Standard | 21,882 | $129,883 | 42.4 | 41.7% |
| 11726 | Copiague | Standard | 21,455 | $128,425 | 2.6 | 1.7% |
| 11790 | Stony Brook | Standard | 21,074 | $171,133 | 6.9 | 13.1% |
| 11747 | Melville | Standard | 20,513 | $159,540 | 12.6 | 3.6% |
| 11738 | Farmingville | Standard | 18,877 | $140,121 | 5.1 | 7.0% |
| 11733 | East Setauket | Standard | 17,752 | $173,281 | 12.1 | 4.0% |
| 11950 | Mastic | Standard | 17,599 | $97,661 | 4.0 | 3.7% |
| 11754 | Kings Park | Standard | 17,565 | $123,393 | 7.8 | -8.5% |
| 11788 | Hauppauge | Standard | 17,374 | $149,726 | 8.5 | 7.5% |
| 11703 | North Babylon | Standard | 17,187 | $137,158 | 3.1 | 5.8% |
| 11951 | Mastic Beach | Standard | 15,938 | $110,862 | 5.1 | 18.9% |
| 11946 | Hampton Bays | Standard | 15,819 | $133,918 | 13.8 | 18.8% |
| 11968 | Southampton | Standard | 15,312 | $156,219 | 28.3 | 42.9% |
| 11780 | Saint James | Standard | 15,018 | $144,577 | 11.2 | -0.5% |
| 11767 | Nesconset | Standard | 14,964 | $152,985 | 4.3 | -1.9% |
| 11949 | Manorville | Standard | 14,563 | $138,864 | 34.3 | 1.6% |
| 11782 | Sayville | Standard | 14,405 | $147,672 | 4.9 | -4.3% |
| 11730 | East Islip | Standard | 14,247 | $145,652 | 4.7 | 0.3% |
| 11702 | Babylon | Standard | 13,909 | $137,652 | 10.8 | -4.2% |
| 11751 | Islip | Standard | 13,726 | $116,559 | 4.1 | -6.5% |
| 11742 | Holtsville | Standard | 13,202 | $125,162 | 5.0 | -0.2% |
| 11953 | Middle Island | Standard | 12,846 | $86,206 | 10.7 | 1.2% |
| 11764 | Miller Place | Standard | 12,551 | $146,813 | 8.8 | -3.2% |
| 11778 | Rocky Point | Standard | 12,390 | $126,349 | 6.8 | -2.8% |
| 11961 | Ridge | Standard | 12,315 | $76,216 | 16.1 | 2.3% |
| 11755 | Lake Grove | Standard | 12,144 | $119,364 | 3.3 | -1.5% |
| 11766 | Mount Sinai | Standard | 10,750 | $153,235 | 5.9 | -15.5% |
| 11740 | Greenlawn | Standard | 10,127 | $152,386 | 3.7 | 6.5% |
| 11716 | Bohemia | Standard | 9,659 | $128,889 | 8.8 | -13.2% |
| 11934 | Center Moriches | Standard | 9,418 | $170,801 | 5.7 | 18.8% |
| 11777 | Port Jefferson | Standard | 9,396 | $150,505 | 4.4 | -0.6% |
| 11713 | Bellport | Standard | 9,218 | $108,173 | 6.0 | -3.3% |
| 11752 | Islip Terrace | Standard | 9,204 | $151,917 | 4.2 | -1.6% |
| 11769 | Oakdale | Standard | 8,935 | $123,558 | 5.0 | 2.5% |
| 11792 | Wading River | Standard | 8,904 | $146,174 | 10.2 | -0.4% |
| 11963 | Sag Harbor | Standard | 8,390 | $127,746 | 16.5 | 23.2% |
| 11705 | Bayport | Standard | 8,284 | $164,300 | 3.4 | 9.4% |
| 11789 | Sound Beach | Standard | 7,369 | $131,528 | 1.7 | -3.8% |
| 11933 | Calverton | Standard | 6,693 | $74,195 | 27.7 | 5.3% |
| 11786 | Shoreham | Standard | 6,459 | $163,466 | 5.3 | -1.4% |
| 11721 | Centerport | Standard | 6,426 | $197,179 | 2.6 | -0.9% |
| 11971 | Southold | Standard | 6,361 | $129,507 | 11.8 | -0.2% |
| 11980 | Yaphank | Standard | 5,855 | $102,600 | 13.2 | 20.6% |
| 11940 | East Moriches | Standard | 5,819 | $138,639 | 5.2 | 16.8% |
| 11942 | East Quogue | Standard | 5,406 | $93,710 | 8.0 | 32.1% |
| 11952 | Mattituck | Standard | 5,040 | $120,139 | 9.7 | 11.6% |
| 11944 | Greenport | Standard | 5,037 | $85,298 | 4.1 | 16.1% |
| 11978 | Westhampton Beach | Standard | 4,705 | $125,179 | 14.0 | 58.8% |
| 11954 | Montauk | Standard | 4,223 | $142,961 | 18.1 | 21.7% |
| 11715 | Blue Point | Standard | 3,936 | $163,125 | 1.7 | -9.2% |
| 11749 | Islandia | Standard | 3,600 | $116,313 | 2.2 | 7.6% |
| 11796 | West Sayville | Standard | 3,560 | $173,472 | 1.5 | -11.3% |
| 11719 | Brookhaven | Standard | 3,235 | $126,250 | 5.1 | -4.1% |
| 11718 | Brightwaters | Standard | 3,179 | $218,000 | 0.9 | 2.0% |
| 11724 | Cold Spring Harbor | Standard | 3,073 | $250,001 | 3.9 | 7.7% |
| 11976 | Water Mill | Standard | 2,952 | $180,250 | 12.9 | 28.3% |
| 11964 | Shelter Island | PO Box | 2,906 | $134,620 | 8.8 | 41.9% |
| 11935 | Cutchogue | Standard | 2,863 | $143,750 | 10.8 | -12.3% |
| 11977 | Westhampton | Standard | 2,843 | $151,375 | 4.9 | 10.6% |
| 11941 | Eastport | Standard | 2,814 | $123,750 | 4.8 | 45.9% |
| 11955 | Moriches | Standard | 2,458 | $79,844 | 2.5 | -11.6% |
| 11939 | East Marion | Standard | 1,331 | $102,500 | 2.3 | 42.8% |
| 11739 | Great River | PO Box | 1,225 | $164,286 | 3.8 | -13.8% |
| 11957 | Orient | Standard | 1,121 | $94,261 | 6.6 | 57.2% |
| 11948 | Laurel | Standard | 924 | $148,398 | 3.3 | -29.7% |
| 11958 | Peconic | Standard | 884 | — | 3.1 | 141.5% |
| 11930 | Amagansett | PO Box | 842 | $123,257 | 9.6 | -46.2% |
| 11794 | Stony Brook | Unique | 831 | — | 0.4 | -74.9% |
| 11960 | Remsenburg | PO Box | 830 | $240,313 | 2.2 | 11.6% |
| 11959 | Quogue | PO Box | 734 | $88,542 | 5.5 | -16.3% |
| 11932 | Bridgehampton | PO Box | 725 | $173,672 | 7.5 | -28.1% |
| 11962 | Sagaponack | PO Box | 712 | — | 6.3 | 57.5% |
| 11975 | Wainscott | PO Box | 450 | $131,042 | 2.8 | 25.3% |
| 11970 | South Jamesport | PO Box | 416 | — | 0.3 | -10.7% |
| 11965 | Shelter Island Heights | PO Box | 404 | — | 3.9 | -34.9% |
| 11972 | Speonk | PO Box | 334 | — | 1.6 | -74.2% |
| 11956 | New Suffolk | PO Box | 298 | $130,875 | 0.6 | 0.0% |
| 11947 | Jamesport | PO Box | 148 | — | 0.2 | 7.2% |
| 11770 | Ocean Beach | PO Box | 77 | $123,571 | 8.8 | -24.5% |
| 06390 | Fishers Island | PO Box | 72 | $98,125 | 4.2 | -75.7% |
| 11973 | Upton | PO Box | 48 | — | 0.5 | 20.0% |
| 11931 | Aquebogue | PO Box | 27 | — | 0.0 | -25.0% |
| 11969 | Southampton | PO Box | — | — | 0.0 | — |
| 11717 | Brentwood | Standard | — | — | 10.7 | — |
| 00544 | Holtsville | Unique | — | — | 0.0 | — |
| 11773 | Melville | Unique | — | — | 0.0 | — |
| 00501 | Holtsville | Unique | — | — | 0.1 | — |
| 11775 | Melville | Unique | — | — | 0.0 | — |
| 11760 | Melville | PO Box | — | — | 0.0 | — |
| 11798 | Wyandanch | Standard | — | — | 3.9 | — |
| 11707 | West Babylon | PO Box | — | — | 0.0 | — |