Suffolk County NY Information


Suffolk County Subdivisions

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


Total Population 1,514,342
Population in Households 1,485,687
Population in Familes 1,263,481
Population in Group Qrtrs 28,655
Population Density1 1,660
Diversity Index2 59


Median Household Income $99,894
Average Household Income $127,434
Per Capita Income $42,729


Total Housing Units 578,068 (100%)
Owner Occupied HU 393,417 (68.1%)
Renter Occupied HU 109,490 (18.9%)
Vacant Housing Units 75,161 (13.0%)
Median Home Value $419,453
Average Home Value $530,353


Total Households 502,907
Average Household Size 2.95
Family Households 369,350
Average Family Size 3
  1. Population Density = Total Population per square mile.
  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 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 0.17% 0.18%
Households 0.07% 0.12%
Families -0.05% 0.04%
Median Household Income   1.55%
Per Capita Income   2.7%


Suffolk County NY - Peer Comparisons by Rank and Percentile

The table below compares Suffolk County to the other 62 counties and county equivalents 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 # 4 95th
Population Density # 9 87th
Diversity Index # 10 85th
Median Household Income # 3 97th
Per Capita Income # 5 94th

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