May we count your visit with Google Analytics? It uses cookies and sends visit data to Google. You can change this any time under Cookie choices. Privacy

Where am ILOCATED

Suffolk County, New York

Suffolk County, New York, has 1,546,090 residents (July 2025 estimate). Its county seat is Riverhead. It uses Eastern Time and covers 911 sq mi (2,359 km²) of land.

New YorkBuffaloYonkers
Suffolk County in New York
Greater Bridgeport Planning RegionSouth Central Connecticut Planning RegionWest BabylonCoramCentral IslipCommack
Suffolk County and its neighbors (simplified outlines). Open in OpenStreetMap ↗
Resident population, July 2025
1,546,090
Land area
911 sq mi (2,359 km²)
County seat or government
Riverhead
Time zone
Eastern TimeUTC-05:00 in January; UTC-04:00 in July
Median household income
$130,686 ± $1,707
Median home value
$578,400 ± $2,887
Median rent, with utilities
$2,255 ± $27
Homes lived in by their owners
82.2% ± 0.5 points
County type
County
Metro or micro area
New York-Newark-Jersey City, NY-NJ metro areaCentral county
Water area
1,462 sq mi (3,787 km²)
State
New York
County code (FIPS)
36103
Coordinates (central point)
40.943554, -72.692218
Open this point in the location finder

These coordinates mark a central point for the area, not a street address. Income, home value, rent and homes lived in by their owners: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, ± margin at 90% confidence; checked on October 13, 2026.

Time zones in Suffolk County

Time zoneLocal time and UTC offsetNext clock change
Eastern TimeAmerica/New_YorkUTC-05:00 in January; UTC-04:00 in July. Enable JavaScript for the live clock.Enable JavaScript for upcoming changes.

Near a time-zone line, check where you are with the time-zone finder. Your phone’s setting can differ.

ZIP Code areas, largest first

  1. 1170668,976 people
  2. 1174665,747 people
  3. 1175854,375 people
  4. 1177245,023 people
  5. 1175744,413 people
  6. 1174343,490 people
  7. 1170440,706 people
  8. 1172239,033 people
  9. 1177938,206 people
  10. 1178734,499 people
  11. 1190133,091 people
  12. 1173532,028 people
All 109
  1. 1173129,999 people
  2. 1176329,973 people
  3. 1170129,509 people
  4. 1172029,292 people
  5. 1172529,073 people
  6. 1172728,495 people
  7. 1196727,975 people
  8. 1172927,231 people
  9. 1174126,667 people
  10. 1178426,244 people
  11. 1179525,379 people
  12. 1177622,808 people
  13. 1176822,030 people
  14. 1193721,882 people
  15. 1172621,455 people
  16. 1179021,074 people
  17. 1174720,513 people
  18. 1173818,877 people
  19. 1173317,752 people
  20. 1195017,599 people
  21. 1175417,565 people
  22. 1178817,374 people
  23. 1170317,187 people
  24. 1195115,938 people
  25. 1194615,819 people
  26. 1196815,312 people
  27. 1178015,018 people
  28. 1176714,964 people
  29. 1194914,563 people
  30. 1178214,405 people
  31. 1173014,247 people
  32. 1170213,909 people
  33. 1175113,726 people
  34. 1174213,202 people
  35. 1195312,846 people
  36. 1176412,551 people
  37. 1177812,390 people
  38. 1196112,315 people
  39. 1175512,144 people
  40. 1176610,750 people
  41. 1174010,127 people
  42. 117169,659 people
  43. 119349,418 people
  44. 117779,396 people
  45. 117139,218 people
  46. 117529,204 people
  47. 117698,935 people
  48. 117928,904 people
  49. 119638,390 people
  50. 117058,284 people
  51. 117897,369 people
  52. 119336,693 people
  53. 117866,459 people
  54. 117216,426 people
  55. 119716,361 people
  56. 119805,855 people
  57. 119405,819 people
  58. 119425,406 people
  59. 119525,040 people
  60. 119445,037 people
  61. 119784,705 people
  62. 119544,223 people
  63. 117153,936 people
  64. 117493,600 people
  65. 117963,560 people
  66. 117193,235 people
  67. 117183,179 people
  68. 117243,073 people
  69. 119762,952 people
  70. 119642,906 people
  71. 119352,863 people
  72. 119772,843 people
  73. 119412,814 people
  74. 119552,458 people
  75. 119391,331 people
  76. 117391,225 people
  77. 119571,121 people
  78. 11948924 people
  79. 11958884 people
  80. 11930842 people
  81. 11794831 people
  82. 11960830 people
  83. 11959734 people
  84. 11932725 people
  85. 11962712 people
  86. 11975450 people
  87. 11970416 people
  88. 11965404 people
  89. 11972334 people
  90. 11956298 people
  91. 11947148 people
  92. 1177077 people
  93. 0639072 people
  94. 1197348 people
  95. 1193127 people
  96. 11717
  97. 11798

109 ZIP Code areas overlap Suffolk County. People counts are 2020–2024 estimates for each whole ZIP area. Mailing ZIPs can differ; check an address with USPS ZIP Code Lookup.

Official county information

We don’t have a website for this county yet. The US government’s local-office directory ↗ lists its offices. A geographic lookup cannot determine eligibility, tax liability or a court obligation.

Towns in Suffolk County, largest first

  1. Town of Brookhaven489,810 people
  2. Town of Islip339,106 people
  3. Town of Babylon218,262 people
  4. Town of Huntington204,059 people
  5. Town of Smithtown116,097 people
  6. Town of Southampton69,679 people
  7. Town of Riverhead35,980 people
  8. Town of East Hampton28,701 people
  9. Town of Southold23,905 people
  10. Town of Shelter Island3,355 people

People counts are American Community Survey 2020–2024 5-year estimates. All towns in New York, by county

School districts in Suffolk County, largest first

  1. Brentwood Union Free School District91,916 people
  2. Sachem Central School District83,436 people
  3. Longwood Central School District69,251 people
  4. Middle Country Central School District64,883 people
  5. Smithtown Central School District55,300 people
  6. Patchogue-Medford Union Free School District52,038 people
  7. William Floyd Union Free School District51,815 people
  8. Three Village Central School District48,218 people
  9. Half Hollow Hills Central School District46,271 people
  10. Riverhead Central School District43,671 people
  11. Central Islip Union Free School District42,195 people
  12. Lindenhurst Union Free School District41,121 people
All 69
  1. South Huntington Union Free School District40,162 people
  2. Farmingdale Union Free School District39,774 people
  3. Connetquot Central School District38,030 people
  4. Commack Union Free School District37,219 people
  5. Bay Shore Union Free School District36,988 people
  6. Northport-East Northport Union Free School District35,588 people
  7. Huntington Union Free School District35,151 people
  8. Copiague Union Free School District33,046 people
  9. North Babylon Union Free School District30,840 people
  10. Amityville Union Free School District28,342 people
  11. West Babylon Union Free School District28,146 people
  12. South Country Central School District27,448 people
  13. West Islip Union Free School District27,000 people
  14. Deer Park Union Free School District25,885 people
  15. Hauppauge Union Free School District23,969 people
  16. East Islip Union Free School District23,867 people
  17. Brookhaven-Comsewogue Union Free School District22,093 people
  18. Kings Park Central School District21,845 people
  19. Eastport-South Manor Central School District19,430 people
  20. Islip Union Free School District18,758 people
  21. Harborfields Central School District18,668 people
  22. Sayville Union Free School District17,019 people
  23. Rocky Point Union Free School District17,005 people
  24. Hampton Bays Union Free School District15,558 people
  25. Miller Place Union Free School District15,188 people
  26. Elwood Union Free School District14,730 people
  27. Southampton Union Free School District14,496 people
  28. Bayport-Blue Point Union Free School District13,329 people
  29. Shoreham-Wading River Central School District13,121 people
  30. East Hampton Union Free School District12,490 people
  31. Babylon Union Free School District11,752 people
  32. Mount Sinai Union Free School District11,074 people
  33. Center Moriches Union Free School District9,190 people
  34. Springs Union Free School District9,163 people
  35. Mattituck-Cutchogue Union Free School District8,827 people
  36. Sag Harbor Union Free School District8,610 people
  37. Cold Spring Harbor Central School District8,386 people
  38. Port Jefferson Union Free School District7,928 people
  39. Westhampton Beach Union Free School District7,320 people
  40. Southold Union Free School District7,138 people
  41. East Moriches Union Free School District6,896 people
  42. East Quogue Union Free School District5,581 people
  43. Greenport Union Free School District5,320 people
  44. Montauk Union Free School District4,223 people
  45. Shelter Island Union Free School District3,355 people
  46. Tuckahoe Common School District3,313 people
  47. Oysterponds Union Free School District2,276 people
  48. Remsenburg-Speonk Union Free School District1,107 people
  49. Bridgehampton Union Free School District1,007 people
  50. Amagansett Union Free School District909 people
  51. Quogue Union Free School District858 people
  52. Wainscott Common School District621 people
  53. Fire Island Union Free School District384 people
  54. New Suffolk Common School District298 people
  55. Sagaponack Common School District294 people
  56. Fishers Island Union Free School District72 people
  57. Wyandanch Union Free School District

Districts with land in the county; a district can cross county lines. People counts are American Community Survey 2020–2024 5-year estimates. A district boundary doesn’t decide which school a student attends.

Tribal areas in Suffolk County, largest first

  1. Poospatuck (state) Reservation742 people
  2. Shinnecock (state) Reservation450 people

American Indian, Alaska Native and Native Hawaiian areas as the Census Bureau maps them, with at least 2% of their area here, water included. These lines don’t decide membership, jurisdiction or land status.

Cities, towns and communities, largest first

These areas overlap the mapped boundary; an overlap does not mean that every address belongs to both.

  1. West Babylon, New York (CDP)43,570 people
  2. Coram, New York (CDP)39,539 people
  3. Central Islip, New York (CDP)38,373 people
  4. Commack, New York (CDP)36,558 people
  5. Huntington Station, New York (CDP)32,601 people
  6. Centereach, New York (CDP)31,839 people
  7. Bay Shore, New York (CDP)31,683 people
  8. Shirley, New York (CDP)28,375 people
  9. Deer Park, New York (CDP)27,990 people
  10. Lindenhurst, New York (village)27,142 people
  11. West Islip, New York (CDP)26,865 people
  12. Holbrook, New York (CDP)26,449 people
All 159
  1. Medford, New York (CDP)24,796 people
  2. Dix Hills, New York (CDP)24,773 people
  3. Smithtown, New York (CDP)24,375 people
  4. Copiague, New York (CDP)23,424 people
  5. East Patchogue, New York (CDP)21,673 people
  6. Selden, New York (CDP)21,604 people
  7. North Amityville, New York (CDP)21,138 people
  8. Hauppauge, New York (CDP)20,793 people
  9. North Bay Shore, New York (CDP)20,282 people
  10. Huntington, New York (CDP)19,948 people
  11. Melville, New York (CDP)19,714 people
  12. East Northport, New York (CDP)19,700 people
  13. Holtsville, New York (CDP)19,344 people
  14. Ronkonkoma, New York (CDP)18,709 people
  15. Lake Ronkonkoma, New York (CDP)18,221 people
  16. North Babylon, New York (CDP)17,963 people
  17. Islip, New York (CDP)17,362 people
  18. Mastic Beach, New York (CDP)16,735 people

See all 159 cities, towns and communities in Suffolk County, largest first

Bordering areas, nearest first

Distances are straight lines between map points.

  1. South Central Connecticut Planning Region, Connecticut25 mi north
  2. Greater Bridgeport Planning Region, Connecticut32 mi northwest
  3. Lower Connecticut River Valley Planning Region, Connecticut35 mi north
  4. Western Connecticut Planning Region, Connecticut46 mi northwest
  5. Southeastern Connecticut Planning Region, Connecticut48 mi northeast
  6. Nassau County, New York49 mi west
  7. Washington County, Rhode Island64 mi northeast

Before using this answer on a form

Use a precise point for address-level questions. A device accuracy circle can cross a boundary; confirm tax, voting or jury details with the responsible office.

Find the county where you are now, check its ZIP area, or check the time zone where you are.

See this county on Census.gov ↗

Areas that only touch the edge

These areas meet the boundary only along a sliver. Most addresses here are not in them; for an address near the line, check with the county.