Holtsville, NY Profile: Facts & Data


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Holtsville, New York - Basic Facts

The Holtsville Census Designated Place had a population of 20,188 as of July 1, 2018. Holtsville ranks in the upper 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 Holtsville is located at latitude 40.8124 and longitude -73.0447 in Suffolk County. The formal boundaries for the Holtsville Census Designated Place (see map below) encompass a land area of 7.11 sq. miles and a water area of 0 sq. miles. Suffolk County is in the Eastern time zone (GMT -5). The elevation is 105 feet.

The Holtsville Census Designated Place (GNIS ID: 2389946) 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 Holtsville Census Designated Place is located within Town of Islip, a minor civil division (MCD) of Suffolk County.

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  1. Holtsville 2018 Demographic Data
  2. Growth Rates for Holtsville (Historical & 5-Year Forecast)
  3. Peer Comparisons (Rank and Percentile)
  1. Neighborhoods Demographics (Home Values, Household Income, etc.)
  2. New York Research Tools (Easy Tools & Current Data)
  3. New York Data Comparison Tool - 2018 Demographics

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Boundary Maps, Demographic Data, School Zones Review maps and data for the neighborhood, city, county, ZIP Code, and school zone. July 1, 2018, data includes home values, household income, percentage of homes owned, rented or vacant, etc.


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


Total Population 20,188
Population in Households 20,142
Population in Familes 17,705
Population in Group Qrtrs 46
Population Density2 2,840
Diversity Index3 41


Median Household Income $102,623
Average Household Income $125,619
Per Capita Income $42,453


Total Housing Units 7,066 (100%)
Owner Occupied HU 5,550 (78.5%)
Renter Occupied HU 1,261 (17.8%)
Vacant Housing Units 255 ( 3.6%)
Median Home Value $369,045
Average Home Value $418,081


Total Households 6,811
Average Household Size 2.96
Family Households 5,179
Average Family Size 3
  1. Demographics are point estimates for July 1st of the current year and each for the forecast years. See References for more information.
  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.


2010-2018 2018-2023
Population 0.29% 0.25%
Households 0.15% 0.17%
Families 0.08% 0.12%
Median Household Income   1.62%
Per Capita Income   2.8%

Holtsville, NY - Peer Comparisons by Rank and Percentile

The table below compares Holtsville 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 # 83 93rd
Population Density # 298 75th
Diversity Index # 322 73rd
Median Household Income # 246 80th
Per Capita Income # 349 71st

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