Middlesex County, NJ Population

The population of Middlesex County is 858,770, according to the U.S. Census Bureau ACS estimates.
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Updated Jun 23, 2023
Overview
858,770
Total Population
39.1
Median age
50.35%
Female population %
98.6:100
Gender ratio (M:F)
35-39 years
Largest age group
49.5
Total dependency ratio
White
Largest racial group
187,049
Hispanic population

Sources: U.S. Census Bureau, American Community Survey (ACS) 2021

Age

Middlesex County's population is old compared to the rest of the country:

  • The median age in Middlesex County is 39.1, compared to 38.8 nationwide, according to the American Community Survey 2017 - 2021 5 Year estimates.
  • Middlesex County's population under 18 was 21.88%, compared to the 22.51% nationwide.
  • Middlesex County's elderly or the senior population (over 65 age) was 15.10% as compared to 16.04% nationwide.
  • Of the total population in Middlesex County, 18.01% were under the age of 15, 19.45% aged 15 to 29, 47.44% aged 30 to 64, 13.16% aged 65 to 84, and 1.93% were 85 years of age and older.
The graph shows Middlesex County's population by age group, with age group on x-axis and the respective age group's percent of the total population on y-axis
Middlesex County, NJ population by age group. The largest age group was 35-39 years with a poulation of 61,039 (7.11% of the total population). Source: U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates.

Read more about Middlesex County, NJ population by age ➔

Gender

There are 6,042 more females than males in Middlesex County:

  • The female percentage in the USA is 50.50% while the male percentage is 49.50%, compared to 50.35% females and 49.65% males in Middlesex County, NJ.
  • The Middlesex County, NJ gender ratio is 98.6:100 i.e. 98.6 men to 100 women (0.986).
  • For male population, the largest age group is 35-39 years with a population of 30,715.
  • For the female population, the largest age group is 55-59 years with a population of 30,383.
The grouped bar chart shows Middlesex County, NJ population by age and gender across 18 age groups, defined between the age of 0 and 85 and above. The female population is shown in pink color bar and male population is shown in blue color bar. Age group is plotted on x axis and population on y axis.
California population by gender and age. Largest age group (population): Male # 35-39 years (30,715) | Female # 55-59 years (30,383). Source: U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates.

Read more about Middlesex County, NJ population by gender ➔

Race / Ethnicity

Middlesex County's population has become increasingly diverse:

  • Racial distribution of Middlesex County population: 51.39% are White, 10.19% are Black or African American, 0.45% are American Indian and Alaska Native, 24.65% are Asian, 0.04% are Native Hawaiian and other Pacific Islander, 6.89% are some other race and 6.38% are multiracial.
  • Middlesex County's racial breakdown clearly shows that there is an absolute majority of White population in the county.
  • By ethnicity, 187,049 is Hispanic or Latino (of any race), and 671,721 (78.22% of the total population) is Non-Hispanic.
  • The largest racial group in Middlesex County is White with a population of 441,363 (51.39% of the total population).
The bar chart shows Middlesex County, NJ population by race, in percentage. The numbers shown are based on the American Community Survey respondents self identified race. The Hispanic and Latino population is spread across the races identified and not as a separate race category.
Middlesex County, NJ population by race. The largest racial group in Middlesex County is White with a population of 441,363 (51.39% of the total population). Source: U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates.

Read more about Middlesex County, NJ population by race ➔

Year by year

Middlesex County's population has already reached its peak and is showing a trend of decline:

  • The peak population was 862,328 in the year 2021
  • From 2000 to 2010, Middlesex County's population increased by 58,107 (7.72%), as compared to the national growth of 9.63%.
  • From 2010 to 2020, Middlesex County's population increased by 50,501 (6.23%), according to Census Bureau's Population Estimates Program. For the same period, the rate of growth for the United States was 7.17%.
  • Between the year 2000 and 2022, Middlesex County's population was lowest in year 2000 at 752,706.
The graph shows Middlesex County's population from 2000 to 2022, with years on x-axis and population on y-axis
Middlesex County's population from 2000 to 2022. The estimated population at the end of 2022 was 861,418. Source: U.S. Census Bureau (Population Estimates Program)

Read more about Middlesex County, NJ population by year ➔

References

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Middlesex County, NJ Demographics

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