Middlesex County, New Jersey Population 2023

879,152

Middlesex County, New Jersey's estimated 2023 population is 879,152 with a growth rate of 0.61% in the past year according to the most recent United States census data. Middlesex County, New Jersey is the 3rd largest county in New Jersey. The 2010 population was 809,858 and has seen a growth of 8.56% since that time.

Note: data after 2021 is projected based on recent change

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2023 Growth Rate
0.61% (5,330)
County Website
Middlesex County
Founded
1683
County Seat
New Brunswick
2010 Population
809,858
Growth Since 2010
8.56% (69,294)

Middlesex County, New Jersey Population 2023

Population by Race

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White

Asian

Black or African American

Other race

Two or more races

Native American

Native Hawaiian or Pacific Islander

Middlesex County, New Jersey Population by Race

Middlesex County, New Jersey Population Pyramid 2023

Middlesex County, New Jersey Median Age

39.1

Total

38.2

Male

40

Female

Middlesex County, New Jersey Adults

There are 670,903 adults, (129,636 of whom are seniors) in Middlesex County, New Jersey.

Middlesex County, New Jersey Age Dependency

58.7

Age Dependency Ratio

24

Old Age Dependency Ratio

34.7

Child Dependency Ratio

Middlesex County, New Jersey Sex Ratio

Female432,40650.35%
Male426,36449.65%

Middlesex County, New Jersey Population by Age

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

3.28

Average Family Size

2.78

Average Household Size

63.9%

Rate of Home Ownership

Married

Male

Female

NonFamily

owner

renter

Middlesex County, New Jersey Households and Families

Male

Female

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Less Than 9th Grade

9th to 12th Grade

High School Graduate

Some College

Associates Degree

Bachelors Degree

Graduate Degree

Middlesex County, New Jersey Educational Attainment by Sex (over 25)

Middlesex County, New Jersey Educational Attainment by Race

High School Graduation Rate

Bachelors Rate

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The highest rate of high school graduation is among white people with a rate of 82.63%.

The highest rate of bachelors degrees is among asian people with a rate of 64.31%.

Middlesex County, New Jersey Educational Attainment by Race

All

Male

Female

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$56,481

Average Earnings

$67,883

Average Male

$45,402

Average Female

Middlesex County, New Jersey Earnings by Educational Attainment

Middlesex County, New Jersey Language by Age

Only English

Spanish

Other Indo-European Languages

Asian and Pacific Island Languages

Other Languages

Middlesex County, New Jersey Language

54.43% of Middlesex County, New Jersey residents speak only English, while 45.57% speak other languages. The non-English language spoken by the largest group is Asian and Pacific Island languages, which is spoken by 20.34% of the population.

Middlesex County, New Jersey Language

Middlesex County, New Jersey Poverty by Race

rate

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8.38%

Overall Poverty Rate

7.38%

Male Poverty Rate

9.35%

Female Poverty Rate

Poverty in Middlesex County, New Jersey

The race most likely to be in poverty in Middlesex County, New Jersey is Hispanic, with 21.66% below the poverty level.

The race least likely to be in poverty in Middlesex County, New Jersey is Asian, with 6.46% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 1.59%. Among those working part-time, it was 10.09%, and for those that did not work, the poverty rate was 15.3%.

Middlesex County, New Jersey Poverty

rate

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Middlesex County, New Jersey Poverty Rate by Education

rate

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

Middlesex County, New Jersey Income by Household Type

Households

Families

MarriedFamilies

NonFamilies

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mean

median

Income by Household Type

Middlesex County, New Jersey Marital Status

Married

Widowed

Divorced

Separated

NeverMarried

Marriage Rates

52.8%

Overall Marriage Rate

55.1%

Male Marriage Rate

50.6%

Female Marriage Rate

Middlesex County, New Jersey Married by Age and Sex

male

female

Middlesex 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 35-44.

Middlesex County, New Jersey Marital Status by Race

Married

Widowed

Divorced

Separated

NeverMarried

Middlesex County, New Jersey Marital Status

Second Gulf War

First Gulf War

Vietnam

Korea

World War II

23,506

Number of Veterans

22,032

Male Veterans

1,474

Female Veterans

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Middlesex County, New Jersey Veterans by War

count

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Middlesex County, New Jersey Veterans by Age

count

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Middlesex County, New Jersey Veterans by Race

Middlesex County, New Jersey Veterans by Education

Less Than 9th Grade

High School Graduate

Some College

Bachelors or Greater

3.96%

Veteran Poverty Rate

29.06%

Veteran Disability Rate

Middlesex County, New Jersey Veterans by Education

LaborForceParticipation

65.7%

Labor Force Participation

61.6%

Employment Rate

6.1%

Unemployment Rate

Middlesex County, New Jersey Employment by Age

LaborForceParticipation

Middlesex County, New Jersey Employment by Race

LaborForceParticipation

Middlesex County, New Jersey Employment by Education

Origin of Non-Citizens

Europe

Asia

Africa

Oceania

Latin America

North America

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

Origin of Naturalized Citizens

Europe

Asia

Africa

Oceania

Latin America

North America

45.51%

Born in Middlesex County, New Jersey

65.86%

Native Born

33.02%

Foreign Born

13.7%

Non Citizen

19.33%

Naturalized

Place of Birth

65.86% of Middlesex County, New Jersey residents were born in the United States, with 45.51% having been born in New Jersey. 13.7% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Asia.

Middlesex County, New Jersey Place of Birth

Sources