Middlesex County, NJ Population

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

TABLE OF CONTENTS

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.

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.

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).

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.