Mercer County NJ Information


Mercer County Subdivisions

Mercer County NJ Data & Demographics (As of July 1, 2017)


Total Population 373,006
Daytime Population: Workers 241,705
Daytime Population: Residents 181,621
Total Daytime Population (TDP) 423,326
Ratio TDP/Total Population1 1.13
Population in Households 353,586
Population in Familes 287,522
Population in Group Qrtrs 19,420
Population Density2 1,661
Diversity Index3 73


Median Household Income $75,396
Average Household Income $110,795
Per Capita Income $42,076


Total Housing Units 146,386 (100%)
Owner Occupied HU 84,741 (57.9%)
Renter Occupied HU 50,966 (34.8%)
Vacant Housing Units 10,679 ( 7.3%)
Median Home Value $299,061
Average Home Value $372,658


Total Households 135,707
Average Household Size 2.61
Family Households 90,997
Average Family Size 3
  1. If the ratio of the TDP to Total Population is greater than 1, the location gains population during the day when commuting workers are present. If the ratio is less than 1, the location is more of a bedroom community where people commute to another place for work.
  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.


2010-2017 2017-2022
Population 0.24% 0.23%
Households 0.26% 0.27%
Families 0.24% 0.26%
Median Household Income   2.18%
Per Capita Income   2.34%


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, 2017 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 Density # 8 67th
Diversity Index # 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.