Islip, New York

1 ZIP code · Eastern time

ZIP codes (largest first)

11751 · 13,726
Population17,362
StateNew York
CountySuffolk County
Time zoneEastern
Land area4.75 sq mi

Area codes in this area

631934

These are the area codes that most often serve Islip (including overlays). The exact area code depends on the phone number — landlines, mobiles and overlays can differ even on the same street.

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Population: U.S. Census Bureau, ACS 5-year estimates, 2024.