Find the last 4 digits (ZIP+4) for an address in 11766

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ZIP Code 11766 – Mount Sinai, NY

Mount Sinai, New York · Suffolk County · Eastern time

ZIP code11766
CityMount Sinai
StateNew York
CountySuffolk County
Population10,750
Time zoneEastern · local time
ZIP typeStandard (has a Census ZCTA area)
Land area6.03 sq mi
Center (lat, long)40.9392, -73.0187

Area codes in this area

631934

These are the area codes that most often serve ZIP 11766 (including overlays). The exact area code depends on the phone number — landlines, mobiles and overlays can differ even on the same street.

Map

Nearby ZIP codes

11776 Port Jefferson Station · 2.3 mi11764 Miller Place · 2.5 mi11777 Port Jefferson · 2.8 mi11789 Sound Beach · 2.9 mi11727 Coram · 4.1 mi11778 Rocky Point · 4.3 mi11953 Middle Island · 4.8 mi11733 East Setauket · 4.9 mi

About ZIP 11766

ZIP code 11766 is assigned to Mount Sinai, New York. It lies in Suffolk County. Its Census area covers about 6.03 square miles of land. The closest neighboring ZIP is 11776 (Port Jefferson Station), about 2.3 miles away.

Every address in 11766 also has a 4-digit add-on code (ZIP+4) that points to a smaller delivery area. Use the box above to find it.

Sources: US Census Bureau (ZCTA, county relationship files), GeoNames (CC BY 4.0), NANPA via NumberResearch.org (CC BY 4.0). Map © OpenStreetMap contributors. ZIP areas are approximate. Population: U.S. Census Bureau, ACS 5-year estimates, 2024 (ZCTA). Data sources