Mercer County NJ Information


Mercer County Subdivisions

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  1. Mercer County 2019 Demographic Data
  2. Growth Rates forMercer County (Historical & 5-Year Forecast)
  3. Peer Comparisons (Rank and Percentile)
  1. Neighborhoods Demographics (Home Values, Household Income, etc.)
  2. New Jersey Research Tools (Easy Tools & Current Data)
  3. New Jersey Data Comparison Tool - 2019 Demographics

Mercer County NJ Data & Demographics (As of July 1, 2019)


Total Population 377,571
Population in Households 357,310
Population in Familes 290,492
Population in Group Qrtrs 20,261
Population Density2 1,681
Diversity Index3 74


Median Household Income $81,187
Average Household Income $122,170
Per Capita Income $44,660


Total Housing Units 146,448 (100%)
Owner Occupied HU 84,241 (57.5%)
Renter Occupied HU 52,231 (35.7%)
Vacant Housing Units 9,976 ( 6.8%)
Median Home Value $315,901
Average Home Value $408,738


Total Households 136,472
Average Household Size 2.62
Family Households 91,530
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.


2010-2019 2019-2024
Population 0.32% 0.27%
Households 0.27% 0.26%
Families 0.25% 0.26%
Median Household Income   2.68%
Per Capita Income   2.63%


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, 2019 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 # 11 52nd
Per Capita Income # 6 76th

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

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New Jersey Census Data Comparison Tool

Compare New Jersey July 1, 2019 Data
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