Monmouth County, NJ Population

Overview

642,160

Total Population

43.3

Median age

51.04%

Female population %

95.9:100

Gender ratio (M:F)

55-59 years

Largest age group

53.3

Total dependency ratio

White

Largest racial group

70,834

Hispanic population

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

TABLE OF CONTENTS

Age

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

The median age in Monmouth County is 43.3, compared to 38.8 nationwide, according to the American Community Survey 2017 - 2021 5 Year estimates.
Monmouth County's population under 18 was 21.22%, compared to the 22.51% nationwide.
Monmouth County's elderly or the senior population (over 65 age) was 17.75% as compared to 16.04% nationwide.
Of the total population in Monmouth County, 17.02% were under the age of 15, 17.95% aged 15 to 29, 47.28% aged 30 to 64, 15.42% aged 65 to 84, and 2.33% were 85 years of age and older.

There are 13,322 more females than males in Monmouth County:

The female percentage in the USA is 50.50% while the male percentage is 49.50%, compared to 51.04% females and 48.96% males in Monmouth County, NJ.
The Monmouth County, NJ gender ratio is 95.9:100 i.e. 95.9 men to 100 women (0.959).
For male population, the largest age group is 55-59 years with a population of 26,230.
For the female population, the largest age group is 55-59 years with a population of 27,379.

Monmouth County's population has become increasingly diverse:

Racial distribution of Monmouth County population: 80% are White, 6.59% are Black or African American, 0.16% are American Indian and Alaska Native, 5.39% are Asian, 0.07% are Native Hawaiian and other Pacific Islander, 2.92% are some other race and 4.86% are multiracial.
Monmouth County's racial breakdown clearly shows that there is an absolute majority of White population in the county.
By ethnicity, 70,834 is Hispanic or Latino (of any race), and 571,326 (88.97% of the total population) is Non-Hispanic.
The largest racial group in Monmouth County is White with a population of 513,756 (80% of the total population).

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

The peak population was 646,392 in the year 2021
From 2000 to 2010, Monmouth County's population increased by 13,461 (2.18%), as compared to the national growth of 9.63%.
From 2010 to 2020, Monmouth County's population increased by 12,317 (1.95%), 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, Monmouth County's population was lowest in year 2000 at 616,993.