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ZIP Code Database - Facts & Stats

Data Last Updated: October 1, 2022

ZIP Codes for City of Smithtown, NY

Smithtown, NY Covers 2 ZIP Codes

ZIP CodeTypeCountyPopulationArea Code(s)
ZIP Code 11787StandardSuffolk35,772631 / 934
ZIP Code 11788StandardSuffolk16,821631 / 934

Timezone(s):Eastern (GMT -05:00)
Counties:SUFFOLK, NY
Population:26,470 (More Details)
Male Population:12,858
Female Population:13,612
Median Age:43
ZIP Codes:2
Area Codes:2
Total Area:2,373 square miles (county)
Land Area:912 square miles (county)
Water Area:1,461 square miles (county)

Smithtown, NY Demographic Information *

Total population26,470
Male population12,858
Female population13,612
Median age (years)42.9
White Population24,870
Black Population291
Indian Population18
Asian Population763
Hawaiian Population2
Hispanic Population1,361
Median age (Male)42
Median age (Female)43.7
Total households8,773
Family households (families)6,959
Average household size2.93
Average family size3.33
Total housing units9,031
* Demographic data is based on 2010 Census. Products


  1. U.S. Postal Service [Last Updated: 10/1/2022],
  2. Internal Data Creation [Last Updated: 10/1/2022],
  3. U.S. Geological Survey [Updated as needed],
  4. U.S. Census [Updated Yearly],
  5. U.S. Census 2010 [Decennial] [Last Updated: 1/1/2010],