Shelter Island, NY Profile: Facts & Data


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Shelter Island, New York - Basic Facts

The Shelter Island Census Designated Place had a population of 1,312 as of July 1, 2020. Shelter Island 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 Shelter Island is located at latitude 41.0682 and longitude -72.3387 in Suffolk County. The formal boundaries for the Shelter Island Census Designated Place encompass a land area of 6.55 sq. miles and a water area of 0.14 sq. miles. Suffolk County is in the Eastern time zone (GMT -5). The elevation is 49 feet.

The Shelter Island Census Designated Place (GNIS ID: 2390288) 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 Shelter Island Census Designated Place is located within Town of Shelter Island, a minor civil division (MCD) of Suffolk County.


Shelter Island, NY Data & Demographics (As of July 1, 2020)


Total Population 1,312 (100%)
Population in Households 1,312 (100.0%)
Population in Families 1,000 (76.2%)
Population in Group Quarters1 0
Population Density 200
Diversity Index2 28


Median Household Income $108,773
Average Household Income $165,437
% of Income for Mortgage4 30%
Per Capita Income $74,270
Wealth Index5 284


Total HU (Housing Units) 1,136 (100%)
Owner Occupied HU 451 (39.7%)
Renter Occupied HU 138 (12.1%)
Vacant Housing Units 547 (48.2%)
Median Home Value $774,089
Average Home Value $808,370
Housing Affordability Index3 84


Total Households 589
Average Household Size 2.23
Family Households 358
Average Family Size 3
  1. Group Quarters - a place where people live or stay in a group living arrangement. Includes college residents halls, nursing facilities, military barracks, and correctional facilities.
  2. 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 races 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.
  3. The Housing Affordability Index base is 100 and represents a balance point where a resident with a median household income can normally qualify to purchase a median price home. Values above 100 indicate increased affordability, while values below 100 indicate decreased affordability.
  4. The % of Income for Mortgage quantifies the percentage of median household income dedicated to mortgage payments on a home priced at the median value (assuming a 30-year mortgage and a 20% down payment).
  5. The Wealth Index is based on a number of indicators of affluence including average household income and average net worth, but it also includes the value of material possessions and resources. It represents the wealth of the area relative to the national level. Values above or below 100 represent above-average wealth or below-average wealth compared to the national level.


2010-2020 2020-2025
Population -0.15% -0.31%
Households -0.15% -0.34%
Families -0.29% -0.45%
Median Household Income   0.01%
Per Capita Income   0.33%
Owner Occupied HU   -0.31%


Shelter Island, NY - Peer Comparisons by Rank and Percentile

The table below compares Shelter Island to the other 1,195 incorporated cities, towns and CDPs in New York by rank and percentile using July 1, 2020 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 # 749 37th
Population Density # 1129 6th
Median Household Income # 231 81st
Housing Affordability Index # 148 12th
Per Capita Income # 90 93rd
Diversity Index # 535 55th

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

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