Lake Ronkonkoma, NY Profile: Facts & Data


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Lake Ronkonkoma, New York - Basic Facts

The Lake Ronkonkoma Census Designated Place had a population of 20,340 as of July 1, 2018. Lake Ronkonkoma 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 Lake Ronkonkoma is located at latitude 40.8351 and longitude -73.1312 in Suffolk County. The formal boundaries for the Lake Ronkonkoma Census Designated Place (see map below) encompass a land area of 4.94 sq. miles and a water area of 0 sq. miles. Suffolk County is in the Eastern time zone (GMT -5). The elevation is 72 feet.

The Lake Ronkonkoma Census Designated Place (GNIS ID: 2390024) 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 Lake Ronkonkoma Census Designated Place is located within Town of Smithtown, a minor civil division (MCD) of Suffolk County.

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  1. Lake Ronkonkoma 2018 Demographic Data
  2. Growth Rates for Lake Ronkonkoma (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.


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


Total Population 20,340
Population in Households 19,917
Population in Familes 16,933
Population in Group Qrtrs 423
Population Density2 4,120
Diversity Index3 42


Median Household Income $94,691
Average Household Income $112,456
Per Capita Income $38,841


Total Housing Units 7,297 (100%)
Owner Occupied HU 4,988 (68.4%)
Renter Occupied HU 1,918 (26.3%)
Vacant Housing Units 391 ( 5.4%)
Median Home Value $370,032
Average Home Value $407,698


Total Households 6,906
Average Household Size 2.88
Family Households 4,937
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 0.11% 0.11%
Households -0.05% 0.02%
Families -0.13% -0.02%
Median Household Income   1.64%
Per Capita Income   2.62%

Lake Ronkonkoma, NY - Peer Comparisons by Rank and Percentile

The table below compares Lake Ronkonkoma 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 # 81 93rd
Population Density # 173 86th
Diversity Index # 316 74th
Median Household Income # 309 74th
Per Capita Income # 424 65th

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