Water Mill, NY Profile: Facts, Map & Data


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Water Mill, New York - Basic Facts

The Water Mill Census Designated Place had a population of 1,763 as of July 1, 2018. Water Mill ranks in the lower quartile for Population Density when compared to the other cities, towns and Census Designated Places (CDPs) in New York. See peer rankings below.

The primary coordinate point for Water Mill is located at latitude 40.9224 and longitude -72.3507 in Suffolk County. The formal boundaries for the Water Mill Census Designated Place (see map below) encompass a land area of 10.54 sq. miles and a water area of 1.48 sq. miles. Suffolk County is in the Eastern time zone (GMT -5). The elevation is 10 feet.

The Water Mill Census Designated Place (GNIS ID: 2390459) 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 Water Mill Census Designated Place is located within Town of Southampton, a minor civil division (MCD) of Suffolk County.

Beneath the boundary map are tables with Water Mill population, income and housing data, five-year growth projections and peer comparisons for key demographic data. The estimates are for July 1, 2018.

Alternate Unofficial Names for Water Mill: Watermill.

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Water Mill Census Designated Place, NY Boundary Map

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

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Water Mill, NY Data & Demographics (As of July 1, 2018)


Total Population 1,763
Population in Households 1,756
Population in Familes 1,384
Population in Group Qrtrs 7
Population Density2 167
Diversity Index3 32


Median Household Income $133,580
Average Household Income $193,296
Per Capita Income $80,452


Total Housing Units 2,286 (100%)
Owner Occupied HU 629 (27.5%)
Renter Occupied HU 105 ( 4.6%)
Vacant Housing Units 1,552 (67.9%)
Median Home Value $2,000,001
Average Home Value $1,847,651


Total Households 734
Average Household Size 2.39
Family Households 476
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 1.5% 0.99%
Households 1.45% 0.94%
Families 1.18% 0.83%
Median Household Income   1.65%
Per Capita Income   2.1%

Water Mill, NY - Peer Comparisons by Rank and Percentile

The table below compares Water Mill to the other 1,196 incorporated cities, towns and CDPs in New York by rank and percentile using July 1, 2018 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 # 658 45th
Population Density # 1153 4th
Diversity Index # 451 63rd
Median Household Income # 98 92nd
Per Capita Income # 57 95th

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

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