Syosset, New York

2 ZIP codes · Eastern time

ZIP codes (largest first)

11791 · 25,52011773 (PO box)
Population18,433
StateNew York
CountyNassau County
Time zoneEastern
Land area4.98 sq mi

Area codes in this area

363516

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

Find the ZIP+4 for an address in Syosset

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