Iselin vs South Plainfield

A side-by-side comparison of Iselin and South Plainfield: population, income, housing, and more.

Iselin and South Plainfield are places in New Jersey. This page compares them across population, income, housing, education, commuting, and how each has changed since 2019.

South Plainfield has the higher population (24,231 vs 19,151 in Iselin). South Plainfield has the higher median household income ($126,063 vs $112,615 in Iselin). South Plainfield has the higher median home value ($443,900 vs $394,200 in Iselin).

Population, income & housing

	Iselin	South Plainfield
Population	19,151	24,231
Median age	38.4 yrs	41.7 yrs
Median household income	$112,615	$126,063
Median home value	$394,200	$443,900
Median gross rent	$2,051	$1,928
Housing units	6,618	8,443
Homeownership rate	66.2%	85.2%
Bachelor's degree or higher	55.0%	42.0%
Unemployment rate	3.1%	7.2%

Trends (ACS 5-year, 2019–2023)

	Iselin	South Plainfield
Population	18,175 → 19,151 (+5.4%)	23,956 → 24,231 (+1.1%)
Median household income	$98,250 → $112,615 (+14.6%)	$101,565 → $126,063 (+24.1%)
Median home value	$306,700 → $394,200 (+28.5%)	$340,200 → $443,900 (+30.5%)
Median gross rent	$1,769 → $2,051 (+15.9%)	$1,702 → $1,928 (+13.3%)

Iselin

Population

18,17519,151

Median household income

$98,250$112,615

Median home value

$306,700$394,200

Median gross rent

$1,769$2,051

South Plainfield

Population

23,95624,231

Median household income

$101,565$126,063

Median home value

$340,200$443,900

Median gross rent

$1,702$1,928

Age & race/ethnicity

Age distribution (share)

	Iselin	South Plainfield
Under 5	4.4%	6.8%
5 to 17	16.1%	14.0%
18 to 24	8.9%	6.8%
25 to 34	13.3%	13.4%
35 to 44	15.9%	13.9%
45 to 54	12.3%	13.2%
55 to 64	12.8%	13.9%
65 to 74	10.6%	11.0%
75 and over	5.7%	7.0%

Race & ethnicity (share)

	Iselin	South Plainfield
White (non-Hispanic)	22.8%	50.6%
Black or African American	8.1%	10.7%
American Indian & Alaska Native	0.1%	0.1%
Asian	54.2%	16.0%
Native Hawaiian & Pacific Islander	0.0%	0.0%
Some other race	0.7%	0.9%
Two or more races	3.3%	3.1%
Hispanic or Latino	10.7%	18.6%

Educational attainment (age 25+)

Share of adults 25+

	Iselin	South Plainfield
No high school diploma	11.1%	7.5%
High school graduate	20.3%	25.3%
Some college or associate's	13.6%	25.2%
Bachelor's degree	28.7%	24.7%
Graduate or professional degree	26.3%	17.3%

Commute to work

How workers get to work (share)

	Iselin	South Plainfield
Drove alone	53.4%	75.6%
Carpooled	6.7%	8.0%
Public transit	14.4%	2.1%
Walked	4.4%	1.3%
Bicycle	0.0%	0.0%
Worked from home	17.8%	12.3%
Other means	3.4%	0.8%

Housing

Units in structure (share)

	Iselin	South Plainfield
1-unit, detached	66.8%	78.7%
1-unit, attached	2.9%	4.6%
2 to 4 units	3.2%	6.1%
5 to 19 units	14.1%	5.2%
20 or more units	12.9%	5.3%
Mobile home & other	0.2%	0.0%

Poverty & households

	Iselin	South Plainfield
Poverty rate	6.4%	3.6%
Average household size	3.01	2.89
Mean commute (minutes)	38	28
Median year structure built	1961	1962