ZIP code · Islip · New York · United States
ZIP code 11751 — Islip
ZIP code 11751 serves Islip, New York.
- Postal code
- 11751Single source Value from one source, not cross-checked.
- City
- Islip
- County
- Suffolk
- State
- New York
- Country
- United States
- Coordinates
- 40.7348, -73.2221 — precision precise (locality)
View on OpenStreetMap - Population
- 13,152 (ZCTA, ACS 5-year)
- Median household income
- $116,328
- Median age
- 46.6
About this page
US ZIP codes have five digits. They are postal routing areas, not administrative boundaries: a ZIP can span more than one city or county, and the city shown is the primary USPS name for that code.
GeoNames · census-acs5. Data generated on 2026-08-21. Methodology · Report an error on this page