Mercer County NJ Information


Mercer County Subdivisions

Mercer County NJ Data & Demographics (As of July 1, 2016)


Total Population 369,493
Population in Households 350,106
Population in Familes 284,267
Population in Group Qrtrs 19,387
Population Density1 1,645
Diversity Index2 72


Total Households 134,864
Average Household Size 2.6
Family Households 90,384
Average Family Size 3


Total Housing Units 146,032 (100%)
Owner Occupied HU 84,730 (58.0%)
Renter Occupied HU 50,134 (34.3%)
Vacant Housing Units 11,168 ( 7.6%)
Median Home Value $290,259
Average Home Value $364,504


Median Household Income $74,336
Average Household Income $107,540
Per Capita Income $41,032
  (Compound Annual Growth Rates)


2010-2015 2015-2020
Population 0.13% 0.17%
Households 0.2% 0.24%
Families 0.17% 0.22%
Median Household Income   1.92%
Per Capita Income   1.4%
1) Population Density = Total Population per square mile.
2) The Diversity Index is a scale of 0 to 100 that represents the likelyhood 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.
Based on Census 2010 counts, the Diversity Index for the United States was 60.6 and it is expected to increase to 64.8 by July 1, 2018.


Mercer County NJ - Peer Comparisons by Rank and Percentile

The table below compares Mercer County to the other 21 counties and county equivalents in New Jersey by rank and percentile using July 1, 2016 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 # 12 48th
Population Density1 # 8 67th
Diversity Index2 # 7 71st
Median Household Income # 10 57th
Per Capita Income # 6 76th

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