Mercer County, New Jersey Population 2020

Mercer County, New Jersey's estimated population is 372,229 with a growth rate of 0.33% in the past year according to the most recent United States census data. Mercer County, New Jersey is the 12th largest county in New Jersey.

Year Population Growth Growth Rate
2020372,2291,2090.33%
2019371,0201,2090.33%
2018369,8111,2090.33%
2017368,6025740.16%
2016368,028-324-0.09%
2015368,352-665-0.18%
2014369,017-500-0.14%
2013369,5179130.25%
2012368,6041,2200.33%
2011367,384-360-0.10%
2010367,74441,92012.87%
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%

Mercer County, New Jersey Population Growth

Population by Race

Race Population Percentage
White234,75963.66%
Black or African American76,17620.66%
Asian39,63210.75%
Some Other Race9,7002.63%
Two or More Races7,8782.14%
American Indian and Alaska Native4910.13%
Native Hawaiian and Other Pacific Islander1260.03%

Mercer County, New Jersey Population Pyramid 2020

Mercer County, New Jersey Median Age

38.7


Total

37.2


Male

40.1


Female

Mercer County, New Jersey Adults

There are 289,590 adults, (53,598 of whom are seniors) in Mercer County, New Jersey.

Mercer County, New Jersey Age Dependency

56.3

Age Dependency Ratio

22.7

Old Age Dependency Ratio

33.5

Child Dependency Ratio

Mercer County, New Jersey Sex Ratio

Female

188,393

51.09%

Male

180,369

48.91%

Mercer County, New Jersey Households and Families

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

Mercer County, New Jersey Household Types

Type Owner Renter
Married80.4%19.6%
All63.9%36.1%
Male51.8%48.2%
Female47.4%52.6%
Non Family46.9%53.1%

63.9%

Rate of Home Ownership

Type Count Average Size Owned
All129,8732.7163.9
Married64,5143.3680.4
Non Family41,9311.2546.9
Female17,1603.5847.4
Male6,2683.3651.8

3.32

Average Family Size

2.71

Average Household Size

4.1%

Unmarried (Opposite Sex)

0.2%

Unmarried (Same Sex)

Mercer County, New Jersey Education

Education Attained Count Percentage
Less Than 9th Grade13,6865.53%
9th to 12th Grade16,0316.47%
High School Graduate60,60524.47%
Some College39,89616.11%
Associates Degree13,5075.45%
Bachelors Degree53,32921.53%
Graduate Degree50,63920.44%

Mercer County, New Jersey Educational Attainment by Race

Name Total High School Bachelors
White135,202128,60468,125
Black48,45940,8118,803
Hispanic36,23422,4285,308
Asian26,14924,45120,694
Other Race6,0003,813924
Multiple Races3,1342,6981,234
Native American36120219
Islander805217

The highest rate of high school graduation is among white people with a rate of 95.12%.

The highest rate of bachelors degrees is among asian people with a rate of 79.14%.

Name Average Male Female
Overall$49,889$55,030$42,185
Less Than High School$21,091$22,392$17,408
High School Grad$31,655$36,118$27,936
Some College$41,953$46,056$37,925
Bachelors Degree$66,003$80,467$56,834
Graduate Degree$91,955$116,081$71,815

$49,889

Average Earnings

$55,030

Average Male

$42,185

Average Female

Mercer County, New Jersey Language

Mercer County, New Jersey Language by Age

Mercer County, New Jersey Language

70.35% of Mercer County, New Jersey residents speak only English, while 29.65% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 14.32% of the population.

Mercer County, New Jersey Poverty

Mercer County, New Jersey Poverty by Race

Name Total In Poverty Poverty Rate
Black72,62914,12919.45%
Hispanic61,68813,40021.72%
White176,9849,5535.40%
Asian37,6712,4916.61%
Other9,5042,24723.64%
Multiple7,41296413.01%
Islander1217965.29%
Native4867715.84%

11.35%

Overall Poverty Rate

10.03%

Male Poverty Rate

12.61%

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 65.29% below the poverty level.

The race least likely to be in poverty in Mercer County, New Jersey is White, with 5.40% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 1.99%. Among those working part-time, it was 11.35%, and for those that did not work, the poverty rate was 20.51%.

Name Poverty
Less Than High School27.36%
High School13.00%
Some College7.51%
Bachelors or Greater3.48%
Name Poverty
Female Unemployed26.33%
Male Unemployed22.77%
Female Employed4.84%
Male Employed4.24%

Mercer County, New Jersey Income

Mercer County, New Jersey Income by Household Type

Name Median Mean
Households$79,990$115,599
Families$102,150$139,457
Married Families$125,445$165,785
Non Families$42,573$60,420

Mercer County, New Jersey Marital Status

Mercer County, New Jersey Marital Status

Marriage Rates

46.6%

Overall Marriage Rate

48.9%

Male Marriage Rate

44.5%

Female Marriage Rate

Mercer County, New Jersey Married by Age and Sex

Mercer County, New Jersey Marriage

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

Mercer County, New Jersey Marital Status by Race

Mercer County, New Jersey Veterans

12,597

Number of Veterans

11,931

Male Veterans

666

Female Veterans

War Veterans
Vietnam4,551
First Gulf War1,581
Second Gulf War1,498
Korea1,335
World War II841
Name Veterans % of Total
White9,4624.98%
Black2,7184.75%
Hispanic8511.95%
Other1912.84%
2 or More1323.11%
Asian700.23%
Indian245.96%

$Mercer County, New Jersey Veterans by Education

6.04%

Veteran Poverty Rate

27.34%

Veteran Disability Rate

Mercer County, New Jersey Employment Status

64.9%

Labor Force Participation

60.5%

Employment Rate

6.8%

Unemployment Rate

Mercer County, New Jersey Place of Birth

Origin of Non-Citizens

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

Origin of Naturalized Citizens

52.04%

Born in New Jersey

77.99%

Native Born

22.01%

Foreign Born

11.65%

Non Citizen

Place of Birth

77.99% of Mercer County, New Jersey residents were born in the United States, with 52.04% having been born in New Jersey. 11.65% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Latin America.

  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