Mount Sinai, NY Profile: Facts, Map & Data


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Mount Sinai, New York - Basic Facts

The Mount Sinai Census Designated Place had a population of 12,048 as of July 1, 2017.

The primary coordinate point for Mount Sinai is located at latitude 40.9433 and longitude -73.0219 in Suffolk County. The formal boundaries for the Mount Sinai Census Designated Place (see map below) encompass a land area of 6 sq. miles and a water area of 0.42 sq. miles. Suffolk County is in the Eastern time zone (GMT -5). The elevation is 33 feet.

The Mount Sinai Census Designated Place (GNIS ID: 2389517) has a U1 Census Class Code which indicates a census designated place with an official federally recognized name. It also has a Functional Status Code of "S" which identifies a statistical entity.

The Mount Sinai Census Designated Place is located within Town of Brookhaven, a minor civil division (MCD) of Suffolk County.

Beneath the boundary map are tables with Mount Sinai population, income and housing data, five-year growth projections and peer comparisons for key demographic data. The estimates are for July 1, 2017.

Alternate Unofficial Names for Mount Sinai: Mount Vernon, Non-o-wan-tuck, Old Mans, Old Man's Harbor, Ould Mans.

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Mount Sinai Census Designated Place, NY Boundary Map

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Boundary Maps: Town of Brookhaven | Suffolk County | New York Counties

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Mount Sinai, NY Data & Demographics (As of July 1, 2017)


Total Population 12,048
Daytime Population: Workers 2,764
Daytime Population: Residents 6,107
Total Daytime Population (TDP) 8,871
Ratio TDP/Total Population1 0.74
Population in Households 12,015
Population in Familes 10,967
Population in Group Qrtrs 33
Population Density2 2,009
Diversity Index3 31


Median Household Income $121,575
Average Household Income $157,003
Per Capita Income $52,721


Total Housing Units 4,285 (100%)
Owner Occupied HU 3,775 (88.1%)
Renter Occupied HU 264 ( 6.2%)
Vacant Housing Units 246 ( 5.7%)
Median Home Value $486,706
Average Home Value $537,722


Total Households 4,039
Average Household Size 2.97
Family Households 3,337
Average Family Size 3
  1. If the ratio of the TDP to Total Population is greater than 1, the location gains population during the day when commuting workers are present. If the ratio is less than 1, the location is more of a bedroom community where people commute to another place for work.
  2. Population Density = Total Population per square mile.
  3. The Diversity Index is a scale of 0 to 100 that represents the likelihood that two persons, chosen at random from the same area, belong to different race or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.


2010-2017 2017-2022
Population -0.08% 0.08%
Households -0.14% 0.03%
Families -0.22% -0.02%
Median Household Income   1.2%
Per Capita Income   1.82%

Mount Sinai, NY - Peer Comparisons by Rank and Percentile

The table below compares Mount Sinai to the other 1,196 incorporated cities, towns and CDPs in New York by rank and percentile using July 1, 2017 data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.

Variable Description Rank Percentile
Total Population # 167 86th
Population Density # 417 65th
Diversity Index # 470 61st
Median Household Income # 116 90th
Per Capita Income # 174 86th

Additional comparisons and rankings can be made with a VERY EASY TO USE New York Census Data Comparison Tool.

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