South Farmingdale, NY Profile: Facts & Data


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South Farmingdale, New York - Basic Facts

The South Farmingdale CDP(1) had a population of 14,496 as of July 1, 2021. South Farmingdale ranks in the upper quartile for Population Density and Diversity Index when compared to the other cities, towns and Census Designated Places (CDPs) in New York. See peer rankings below.

The primary coordinate point for South Farmingdale is located at latitude 40.7207 and longitude -73.4401 in Nassau County. The formal boundaries for the South Farmingdale Census Designated Place encompass a land area of 2.22 sq. miles and a water area of 0 sq. miles. Nassau County is in the Eastern time zone (GMT -5). The elevation is 59 feet.

The South Farmingdale Census Designated Place 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 South Farmingdale Census Designated Place is located within Town of Oyster Bay, a minor civil division (MCD) of Nassau County.

  1. A Census Designated Place (CDP) is a statistical counterpart to a self-governing (incorporated) place such as a city, town, or village. A CDP is not a legal entity and has no governmental functions.

Jump to... (On This Page!)
  1. South Farmingdale 2021 Demographic Data
  2. Growth Rates for South Farmingdale (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 - 2021 Demographics

South Farmingdale, NY Data & Demographics (As of July 1, 2021)


Total Population 14,496 (100%)
Population in Households 14,468 (99.8%)
Population in Families 12,983 (89.6%)
Population in Group Quarters1 28 ( 0.2%)
Population Density 6,536
Diversity Index2 47


Median Household Income $119,237
Average Household Income $138,608
% of Income for Mortgage4 16%
Per Capita Income $46,140
Wealth Index5 200


Total HU (Housing Units) 4,967 (100%)
Owner Occupied HU 4,393 (88.4%)
Renter Occupied HU 432 ( 8.7%)
Vacant Housing Units 142 ( 2.9%)
Median Home Value $458,502
Average Home Value $517,824
Housing Affordability Index3 114


Total Households 4,825
Average Household Size 3.0
Family Households 3,893
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.


2010-2021 2021-2026
Population 0.01% -0.12%
Households 0.08% -0.1%
Families -0.01% -0.14%
Median Household Income   1.91%
Per Capita Income   2.21%
Owner Occupied HU   0.01%

South Farmingdale, NY - Peer Comparisons by Rank and Percentile

The table below compares South Farmingdale to the other 1,195 incorporated cities, towns and CDPs in New York by rank and percentile using July 1, 2021 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 # 137 89th
Population Density # 76 94th
Median Household Income # 201 83rd
Housing Affordability Index # 391 33rd
Per Capita Income # 331 72nd
Diversity Index # 288 76th

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

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