South Plainfield, NJ Population

Overview

24,251

Total Population

41.2

Median age

49.97%

Female population %

100.1:100

Gender ratio (M:F)

25-29 years

Largest age group

50.5

Total dependency ratio

White

Largest racial group

4,397

Hispanic population

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

TABLE OF CONTENTS

Age

South Plainfield's population is old compared to the rest of the country:

The median age in South Plainfield is 41.2, compared to 38.8 nationwide, according to the American Community Survey 2017 - 2021 5 Year estimates.
South Plainfield's population under 18 was 20.24%, compared to the 22.51% nationwide.
South Plainfield's elderly or the senior population (over 65 age) was 17.22% as compared to 16.04% nationwide.
Of the total population in South Plainfield, 16.34% were under the age of 15, 18.51% aged 15 to 29, 47.92% aged 30 to 64, 15.18% aged 65 to 84, and 2.05% were 85 years of age and older.

There are 15 less females than males in South Plainfield:

The female percentage in the USA is 50.50% while the male percentage is 49.50%, compared to 49.97% females and 50.03% males in South Plainfield, NJ.
The South Plainfield, NJ gender ratio is 100.1:100 i.e. 100.1 men to 100 women (1.001).
For male population, the largest age group is 25-29 years with a population of 1,161.
For the female population, the largest age group is 40-44 years with a population of 1,111.

South Plainfield's population has become increasingly diverse:

Racial distribution of South Plainfield population: 59.72% are White, 12.59% are Black or African American, 13.57% are Asian, 0.03% are Native Hawaiian and other Pacific Islander, 7.27% are some other race and 6.82% are multiracial.
South Plainfield's racial breakdown clearly shows that there is an absolute majority of White population in the borough.
By ethnicity, 4,397 is Hispanic or Latino (of any race), and 19,854 (81.87% of the total population) is Non-Hispanic.
The largest racial group in South Plainfield is White with a population of 14,483 (59.72% of the total population).

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

The peak population was 24,300 in the year 2021
From 2000 to 2010, South Plainfield's population increased by 1,543 (7.06%), as compared to the national growth of 9.63%.
From 2010 to 2020, South Plainfield's population increased by 900 (3.85%), 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, South Plainfield's population was lowest in year 2000 at 21,844.