Mount Sinai, New York

Mount Sinai, New York
The c.1807 Mount Sinai Congregational Church
U.S. Census map
Mount Sinai
Location within the state of New York
Mount Sinai
Mount Sinai (New York)
Mount Sinai
Mount Sinai (the United States)
Coordinates: 40°56′19″N 73°1′7″W / 40.93861°N 73.01861°W / 40.93861; -73.01861
CountryUnited States
StateNew York
CountySuffolk
Area
  Total
7.44 sq mi (19.27 km2)
  Land6.00 sq mi (15.54 km2)
  Water1.44 sq mi (3.73 km2)
Elevation
33 ft (10 m)
Population
 (2020)
  Total
11,623
  Density1,937.49/sq mi (748.02/km2)
Time zoneUTC−05:00 (Eastern Time Zone)
  Summer (DST)UTC−04:00
ZIP Code
11766
Area code(s)631, 934
FIPS code36-49066
GNIS feature ID0957909

Mount Sinai is a hamlet and census-designated place (CDP) located within the Town of Brookhaven, in Suffolk County, New York, United States. The population was 12,118 at the 2010 census. The hamlet is located on the North Shore of Long Island.

Mount Sinai was first settled in the 1660s and was known by the name of Old Mans until a name change in the 1840s. Initially an agricultural hamlet, it transitioned into a popular resort town in the late-19th century and developed into a suburb of New York City in the mid-20th century. While primarily a residential community, the hamlet contains Mount Sinai Harbor and its popular public beach, Cedar Beach.