Mount Sinai is a hamlet located within the Town of Brookhaven in Suffolk County, New York. 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. Mount Sinai is also home to Mount Sinai Hospital.
Population: 12,118
Zip Code: 11766
Area Code: 631
Elevation: 33′
