South Plainfield, New Jersey Population 2021

24,108
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South Plainfield is a city located in Middlesex County New Jersey. With a 2020 population of 24,108, it is the 39th largest city in New Jersey and the 1595th largest city in the United States . South Plainfield is currently growing at a rate of 0.12% annually and its population has increased by 3.09% since the most recent census, which recorded a population of 23,385 in 2010. South Plainfield reached it's highest population of 24,108 in 2021. Spanning over 8 miles, South Plainfield has a population density of 2,906 people per square mile.

The average household income in South Plainfield is $110,042 with a poverty rate of 2.77%. The median rental costs in recent years comes to $1,702 per month, and the median house value is $340,200. The median age in South Plainfield is 40.4 years, 38.4 years for males, and 42.2 years for females.

South Plainfield Demographics

According to the most recent ACS, the racial composition of South Plainfield was:

  • White: 61.56%
  • Asian: 14.56%
  • Black or African American: 12.26%
  • Other race: 7.46%
  • Two or more races: 4.13%
  • Native Hawaiian or Pacific Islander: 0.03%
  • Native American: 0.00%
The current population of South Plainfield, New Jersey is 24,108 based on our projections of the latest US Census estimates. The US Census estimates the 2018 population at 24,024.The last official US Census in 2010 recorded the population at 23,385.

South Plainfield, New Jersey Population 2021

Population by Race

Race Population Percentage
White14,74861.56%
Asian3,48714.56%
Black or African American2,93612.26%
Some Other Race1,7877.46%
Two or More Races9904.13%
Native Hawaiian and Other Pacific Islander80.03%
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South Plainfield Population by Race

South Plainfield Population Pyramid $2021

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South Plainfield Median Age

40.4


Total

38.4


Male

42.2


Female

South Plainfield Adults

There are 18,720 adults, (3,704 of whom are seniors) in South Plainfield.

South Plainfield Age Dependency

59.5

Age Dependency Ratio

24.7

Old Age Dependency Ratio

34.9

Child Dependency Ratio

South Plainfield Sex Ratio

Female

11,880

49.59%

Male

12,076

50.41%

South Plainfield Population by Age

South Plainfield Renter vs Owner Occupied by Household Type

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South Plainfield Household Types

Type Owner Renter
Married90.6%9.4%
All84.5%15.5%
Non Family72.3%27.7%
Female72.3%27.7%
Male71%29%

84.5%

Rate of Home Ownership

South Plainfield Households and Families

Type Count Average Size Owned
All7,9242.9984.5
Married5,3033.4890.6
Non Family1,5011.1872.3
Female7513.272.3
Male3692.8571

3.36

Average Family Size

2.99

Average Household Size

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South Plainfield Households by Type

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Education Attained Count Percentage
Less Than 9th Grade7894.64%
9th to 12th Grade7544.43%
High School Graduate5,19830.55%
Some College3,21018.86%
Associates Degree1,1316.65%
Bachelors Degree3,87322.76%
Graduate Degree2,06212.12%
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South Plainfield Educational Attainment by Sex (over 25)

South Plainfield Educational Attainment by Race

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Race Total High School Bachelors
White9,5458,8002,982
Asian2,5502,3851,412
Hispanic2,5182,117746
Black2,0271,959677
Other Race1,019924388
2+ Races480316158
Islander88

The highest rate of high school graduation is among islander people with a rate of 100.00%.

The highest rate of bachelors degrees is among asian people with a rate of 55.37%.

South Plainfield Educational Attainment by Race

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Name Average Male Female
Overall$51,826$60,129$43,073
Less Than 9th Grade$18,750$$17,972
High School Graduate$40,847$50,576$29,754
Some College$48,399$52,686$44,403
Bachelors Degree$72,055$77,891$61,200
Graduate Degree$79,926$104,696$63,542

$51,826

Average Earnings

$60,129

Average Male

$43,073

Average Female

South Plainfield Earnings by Educational Attainment

South Plainfield Language by Age

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South Plainfield Language

69.02% of South Plainfield residents speak only English, while 30.98% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 14.32% of the population.

South Plainfield Language

South Plainfield Poverty by Race

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Name Total In Poverty Poverty Rate
White12,2673953.22%
Hispanic4,4812134.75%
Other1,787864.81%
Black2,888431.49%

2.77%

Overall Poverty Rate

1.95%

Male Poverty Rate

3.62%

Female Poverty Rate

Poverty in South Plainfield

The race most likely to be in poverty in South Plainfield is Other, with 4.81% below the poverty level.

The race least likely to be in poverty in South Plainfield is Black, with 1.49% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 0.91%. Among those working part-time, it was 3.26%, and for those that did not work, the poverty rate was 6.68%.

South Plainfield Poverty

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Name Poverty
Less Than 9th Grade9.97%
High School3.57%
Some College1.48%
Bachelors or Greater1.13%

South Plainfield Poverty Rate by Education

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Rate Poverty
Male Unemployed5.82%
Female Unemployed5.48%
Female Employed2.22%
Male Employed0.90%

South Plainfield Poverty Rate by Employment Status and Sex

South Plainfield Income by Household Type

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Name Median Mean
Households$101,565$110,042
Families$112,897$120,599
Married Families$121,465-
Non Families$50,521$58,347
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Income by Household Type

South Plainfield Marital Status

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Marriage Rates

59.7%

Overall Marriage Rate

60.1%

Male Marriage Rate

59.2%

Female Marriage Rate

South Plainfield Married by Age and Sex

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South Plainfield 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 45-54.

South Plainfield Marital Status by Race

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South Plainfield Marital Status

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868

Number of Veterans

837

Male Veterans

31

Female Veterans

War Veterans
Vietnam374
Second Gulf War157
Korea137
First Gulf War100
World War II46

South Plainfield Veterans by War

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Age Group Veterans
75+313
65 to 74251
55 to 64114
35 to 5499
18 to 3491

South Plainfield Veterans by Age

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Name Veterans % of Total
White7125.99%
Black1255.55%
Hispanic602.00%
2+ Races142.54%
Asian130.46%
Other Race40.33%

South Plainfield Veterans by Race

South Plainfield Veterans by Education

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2.47%

Veteran Poverty Rate

22.94%

Veteran Disability Rate

South Plainfield Veterans by Education

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71%

Labor Force Participation

66.1%

Employment Rate

6.9%

Unemployment Rate

South Plainfield Employment by Age

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South Plainfield Employment by Race

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South Plainfield Employment by Education

Origin of Non-Citizens

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

Origin of Naturalized Citizens

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59.76%

Born in South Plainfield

77.23%

Native Born

22.77%

Foreign Born

7.83%

Non Citizen

14.94%

Naturalized

Place of Birth

77.23% of South Plainfield residents were born in the United States, with 59.76% having been born in New Jersey. 7.83% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Asia.

South Plainfield Place of Birth

Year Population Growth Annual Growth Rate
202124,108280.12%
202024,080280.12%
201924,052280.12%
201824,024590.25%
201723,965980.41%
201623,867250.10%
201523,8422070.88%
201423,635620.26%
201323,573180.08%
201223,5551150.49%
201123,440570.24%
201023,3831,5730.70%
200021,8101,3210.63%
199020,489-32-0.02%
198020,521-621-0.30%
197021,1423,2631.69%
196017,8799,8718.36%
19508,0082,6294.06%
19405,3793320.64%
19305,0470.00%

South Plainfield Population by Year