Mount Sinai, New York

Mount Sinai, New York
Hamlet and census-designated place
The c.1807 Mount Sinai Congregational Church
U.S. Census map
Mount Sinai Location within the state of New York Show map of Long Island Mount Sinai Mount Sinai (New York) Show map of New York Mount Sinai Mount Sinai (the United States) Show map of the United States
Coordinates: 40°56′19″N 73°1′7″W / 40.93861°N 73.01861°W / 40.93861; -73.01861
Country	United States
State	New York
County	Suffolk
Area [1]
• Total	7.44 sq mi (19.27 km2)
• Land	6.00 sq mi (15.54 km2)
• Water	1.44 sq mi (3.73 km2)
Elevation	33 ft (10 m)
Population  (2020)
• Total	11,623
• Density	1,937.49/sq mi (748.02/km2)
Time zone	UTC−05:00 (Eastern Time Zone)
• Summer (DST)	UTC−04:00
ZIP Code	11766
Area code(s)	631, 934
FIPS code	36-49066
GNIS feature ID	0957909

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.^[2] 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.^[3] While primarily a residential community, the hamlet contains Mount Sinai Harbor and its popular public beach, Cedar Beach.