Mercer County, New Jersey Population 2021

Mercer County, New Jersey's estimated population is 365,914 with a growth rate of -0.21% in the past year according to the most recent United States census data. Mercer County, New Jersey is the null largest county in New Jersey. The 2010 Population was 367,713 and has seen a growth of -0.49% since this time.

Note: 2020 and 2021 data is projected
Year Population Growth Growth Rate
2021365,914-758-0.21%
2020366,672-758-0.21%
2019367,430-758-0.21%
2018368,188200.01%
2017368,1684690.13%
2016367,699-425-0.12%
2015368,124-785-0.21%
2014368,909-520-0.14%
2013369,4298750.24%
2012368,5541,1760.32%
2011367,378-335-0.09%
2010367,71341,88912.86%
1990325,82417,9615.83%
1980307,8633,8951.28%
1970303,96837,57614.11%
1960266,39236,61115.93%
1950229,78132,46316.45%
1940197,31810,1755.44%
1930187,14327,26217.05%
1920159,88134,22427.24%
1910125,65730,29231.76%
190095,36515,38719.24%
189079,97821,91737.75%
188058,06111,67525.17%
187046,3868,96723.96%
186037,4199,42733.68%
185027,9926,49030.18%
184021,5020.00%
2021 Growth Rate
-0.21%
County Website
Founded
1838
County Seat
2010 Population
367,713
Growth Since 2010
-0.49%
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Mercer County, New Jersey Population Growth

Population by Race

Race Population Percentage
White231,53362.93%
Black or African American76,16620.70%
Asian40,88211.11%
Some Other Race10,7232.91%
Two or More Races7,8512.13%
American Indian and Alaska Native6290.17%
Native Hawaiian and Other Pacific Islander1380.04%
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Mercer County, New Jersey Population By Race

Mercer County, New Jersey Population Pyramid 2021

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Mercer County, New Jersey Median Age

38.8


Total

37.3


Male

40.2


Female

Mercer County, New Jersey Adults

There are 289,218 adults, (54,941 of whom are seniors) in Mercer County, New Jersey.

Mercer County, New Jersey Age Dependency

57

Age Dependency Ratio

23.5

Old Age Dependency Ratio

33.6

Child Dependency Ratio

Mercer County, New Jersey Sex Ratio

Mujer

188,076

51.12%

Masculino

179,846

48.88%

Mercer County, New Jersey Population by Age

Mercer County, New Jersey Renter vs Owner Occupied by Household Type

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Mercer County, New Jersey Household Types

Type Owner Renter
Married80%20%
All63.1%36.9%
Masculino54.5%45.5%
Mujer46.2%53.8%
Non Family45.8%54.2%

63.1%

Rate of Home Ownership

Mercer County, New Jersey Households and Families

Type Count Average Size Owned
All129,9362.763.1
Married63,8323.3580
Non Family42,4681.2645.8
Mujer17,2333.6246.2
Masculino6,4033.2854.5

3.32

Average Family Size

2.7

Average Household Size

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Mercer County, New Jersey Households by Type

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Education Attained Count Percentage
Less Than 9th Grade12,4265.02%
9th to 12th Grade16,0336.48%
High School Graduate60,78024.55%
Some College38,87415.70%
Associates Degree13,9545.64%
Bachelors Degree54,54722.04%
Graduate Degree50,92020.57%
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Mercer County, New Jersey Educational Attainment by Sex (over 25)

Mercer County, New Jersey Educational Attainment by Race

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Race Total High School Bachelors
White133,491127,53368,240
Black48,92841,2779,016
Hispanic36,84923,4575,684
Asian27,01625,41121,649
Other Race6,2883,9201,008
2+ Races3,1212,7371,071
Native American37122087
Islander947835

The highest rate of high school graduation is among white people with a rate of 95.54%.

The highest rate of bachelors degrees is among asian people with a rate of 80.13%.

Mercer County, New Jersey Educational Attainment by Race

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Name Average Masculino Mujer
Overall$50,730$56,749$43,245
Less Than 9th Grade$22,132$25,024$20,010
High School Graduate$31,571$35,984$27,042
Some College$43,264$46,370$39,626
Bachelors Degree$66,298$80,505$57,060
Graduate Degree$94,309$118,777$71,916

$50,730

Average Earnings

$56,749

Average Male

$43,245

Average Female

Mercer County, New Jersey Earnings by Educational Attainment

Mercer County, New Jersey Language by Age

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Mercer County, New Jersey Language

69.49% of Mercer County, New Jersey residents speak only English, while 30.51% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 14.65% of the population.

Mercer County, New Jersey Language

Mercer County, New Jersey Poverty by Race

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Name Total In Poverty Poverty Rate
Black72,68514,39019.80%
Hispanic62,75013,61621.70%
White174,32710,3905.96%
Other10,6542,40822.60%
Asian38,8262,2535.80%
Multiple7,3731,10715.01%
Native617599.56%
Islander1345339.55%

11.64%

Overall Poverty Rate

10.21%

Male Poverty Rate

13.01%

Female Poverty Rate

Poverty in Mercer County, New Jersey

The race most likely to be in poverty in Mercer County, New Jersey is Islander, with 39.55% below the poverty level.

The race least likely to be in poverty in Mercer County, New Jersey is Asian, with 5.80% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 2.01%. Among those working part-time, it was 12.65%, and for those that did not work, the poverty rate was 20.85%.

Mercer County, New Jersey Poverty

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Name Poverty
Less Than 9th Grade27.96%
High School13.59%
Some College7.84%
Bachelors or Greater3.42%

Mercer County, New Jersey Poverty Rate by Education

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Name Poverty
Female Unemployed27.04%
Male Unemployed23.97%
Female Employed5.48%
Male Employed4.06%

Mercer County, New Jersey Poverty Rate by Employment Status and Sex

Mercer County, New Jersey Income by Household Type

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Name Median Mean
Households$81,057$117,651
Families$105,309$143,477
Married Families$129,240$170,743
Non Families$42,039$59,097
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Income by Household Type

Mercer County, New Jersey Marital Status

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Marriage Rates

46.2%

Overall Marriage Rate

48.6%

Male Marriage Rate

44.1%

Female Marriage Rate

Mercer County, New Jersey Married by Age and Sex

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Mercer County, New Jersey Marriage

The age group where males are most likely to be married is Over 65, while the female age group most likely to be married is 45-54.

Mercer County, New Jersey Marital Status by Race

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Mercer County, New Jersey Marital Status

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12,035

Number of Veterans

11,452

Male Veterans

583

Female Veterans

War Veterans
Vietnam4,422
First Gulf War1,510
Korea1,399
Second Gulf War1,296
World War II695

Mercer County, New Jersey Veterans by War

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Age Group Veterans
75+3,972
65 to 743,212
35 to 542,229
55 to 642,117
18 to 34505

Mercer County, New Jersey Veterans by Age

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Name Veterans % of Total
White9,0194.80%
Black2,5954.51%
Hispanic7301.65%
Other Race1532.14%
2+ Races1333.23%
Asian980.31%
Native American378.13%

Mercer County, New Jersey Veterans by Race

Mercer County, New Jersey Veterans by Education

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6.93%

Veteran Poverty Rate

27.84%

Veteran Disability Rate

Mercer County, New Jersey Veterans by Education

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64.4%

Labor Force Participation

60.4%

Employment Rate

6.1%

Unemployment Rate

Mercer County, New Jersey Employment by Age

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Mercer County, New Jersey Employment by Race

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Mercer County, New Jersey Employment by Education

Origin of Non-Citizens

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Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.

Origin of Naturalized Citizens

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51.39%

Born in Mercer County, New Jersey

77.10%

Native Born

22.90%

Foreign Born

11.90%

Non Citizen

11.00%

Naturalized

Place of Birth

77.10% of Mercer County, New Jersey residents were born in the United States, with 51.39% having been born in New Jersey. 11.90% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Latin America.

Mercer County, New Jersey Place of Birth

  1. US Census City/Town Population estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. Population of States and Counties of the United States: 1790 - 1990

Sources