Islandia, New York Zip Codes
📍 Islandia is in Suffolk County, New York with 2 zip codes; the most populous is 11749.
Islandia is a USPS city name in Suffolk County, New York with a Census population of approximately 3,581 across its ZIP codes. Suffolk County as a whole has 117 ZIP codes in this directory. Below you'll find every zip code serving Islandia with population, income and home value, a map, and the city's affordability profile.
Population and demographic data sourced from the U.S. Census Bureau American Community Survey (ACS) 5-Year Estimates. ZIP code routing data sourced from the United States Postal Service (USPS).
All Islandia Zip Codes
Islandia at a Glance
Islandia has 2 ZIP codes in this directory: 2 standard delivery ZIPs. Its one ZIP with published Census housing data, 11749, has 3,581 residents.
Islandia's ZIP has a household income of $112,435 and a home value of $451,700, a price-to-income ratio of 4.0, above the 2.9 New York ZIP median. Median rent across these ZIPs is $1,781 a month.
96% of households in Islandia own their home (statewide ZIP median 80%). 31% of adults hold a bachelor's degree, in line with the 31% statewide median. The median poverty rate is 3.4%, far below the 9.9% statewide ZIP median. Overall density is about 1,628 residents per square mile across 2 square miles of ZIP land area.
Medians are taken across the ZIP codes listed below (each ZIP weighted equally); PO Box and no-data ZIPs are excluded. Definitions on the methodology page; statewide comparisons in the 2026 New York ZIP Code Affordability Report.
Islandia Zip Code Map
Interactive map of Islandia, New York zip codes. Click any marker for details.