Smithtown, NY Profile: Facts, Map & Data


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Smithtown, New York - Basic Facts

The Smithtown Census Designated Place had a population of 26,761 as of July 1, 2017.

The primary coordinate point for Smithtown is located at latitude 40.8634 and longitude -73.2244 in Suffolk County. The formal boundaries for the Smithtown Census Designated Place (see map below) encompass a land area of 11.62 sq. miles and a water area of 0.49 sq. miles. Suffolk County is in the Eastern time zone (GMT -5). The elevation is 59 feet.

The Smithtown Census Designated Place (GNIS ID: 2390309) 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 Smithtown Census Designated Place is located within Town of Smithtown, a minor civil division (MCD) of Suffolk County.

Beneath the boundary map are tables with Smithtown 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 Smithtown: Head of the River.

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Smithtown Census Designated Place, NY Boundary Map

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


Total Population 26,761
Daytime Population: Workers 10,177
Daytime Population: Residents 13,806
Total Daytime Population (TDP) 23,983
Ratio TDP/Total Population1 0.90
Population in Households 25,994
Population in Familes 23,398
Population in Group Qrtrs 767
Population Density2 2,303
Diversity Index3 26


Median Household Income $120,016
Average Household Income $155,914
Per Capita Income $52,417


Total Housing Units 9,160 (100%)
Owner Occupied HU 7,596 (82.9%)
Renter Occupied HU 1,245 (13.6%)
Vacant Housing Units 319 ( 3.5%)
Median Home Value $525,066
Average Home Value $580,595


Total Households 8,841
Average Household Size 2.94
Family Households 6,959
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 0.15% 0.25%
Households 0.11% 0.21%
Families 0.0% 0.15%
Median Household Income   1.31%
Per Capita Income   2.03%

Smithtown, NY - Peer Comparisons by Rank and Percentile

The table below compares Smithtown 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 # 60 95th
Population Density # 380 68th
Diversity Index # 549 54th
Median Household Income # 119 90th
Per Capita Income # 176 85th

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

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