Iselin vs South River

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

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

Iselin has the higher population (19,151 vs 16,007 in South River). Iselin has the higher median household income ($112,615 vs $101,853 in South River). Iselin has the higher median home value ($394,200 vs $382,500 in South River).

Population, income & housing

	Iselin	South River
Population	19,151	16,007
Median age	38.4 yrs	36.5 yrs
Median household income	$112,615	$101,853
Median home value	$394,200	$382,500
Median gross rent	$2,051	$1,599
Housing units	6,618	5,789
Homeownership rate	66.2%	65.7%
Bachelor's degree or higher	55.0%	31.1%
Unemployment rate	3.1%	8.9%

Trends (ACS 5-year, 2019–2023)

	Iselin	South River
Population	18,175 → 19,151 (+5.4%)	16,001 → 16,007 (+0.0%)
Median household income	$98,250 → $112,615 (+14.6%)	$78,162 → $101,853 (+30.3%)
Median home value	$306,700 → $394,200 (+28.5%)	$299,600 → $382,500 (+27.7%)
Median gross rent	$1,769 → $2,051 (+15.9%)	$1,288 → $1,599 (+24.1%)

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 River

Population

16,00116,007

Median household income

$78,162$101,853

Median home value

$299,600$382,500

Median gross rent

$1,288$1,599

Age & race/ethnicity

Age distribution (share)

	Iselin	South River
Under 5	4.4%	7.5%
5 to 17	16.1%	18.3%
18 to 24	8.9%	6.0%
25 to 34	13.3%	15.2%
35 to 44	15.9%	14.8%
45 to 54	12.3%	11.1%
55 to 64	12.8%	13.5%
65 to 74	10.6%	6.7%
75 and over	5.7%	6.9%

Race & ethnicity (share)

	Iselin	South River
White (non-Hispanic)	22.8%	53.4%
Black or African American	8.1%	10.4%
American Indian & Alaska Native	0.1%	0.0%
Asian	54.2%	4.1%
Native Hawaiian & Pacific Islander	0.0%	0.2%
Some other race	0.7%	2.3%
Two or more races	3.3%	2.9%
Hispanic or Latino	10.7%	26.7%

Educational attainment (age 25+)

Share of adults 25+

	Iselin	South River
No high school diploma	11.1%	13.6%
High school graduate	20.3%	31.8%
Some college or associate's	13.6%	23.4%
Bachelor's degree	28.7%	19.7%
Graduate or professional degree	26.3%	11.5%

Commute to work

How workers get to work (share)

	Iselin	South River
Drove alone	53.4%	72.4%
Carpooled	6.7%	10.9%
Public transit	14.4%	1.9%
Walked	4.4%	1.9%
Bicycle	0.0%	0.0%
Worked from home	17.8%	6.6%
Other means	3.4%	6.3%

Housing

Units in structure (share)

	Iselin	South River
1-unit, detached	66.8%	75.5%
1-unit, attached	2.9%	1.5%
2 to 4 units	3.2%	10.1%
5 to 19 units	14.1%	8.8%
20 or more units	12.9%	4.2%
Mobile home & other	0.2%	0.0%

Poverty & households

	Iselin	South River
Poverty rate	6.4%	11.3%
Average household size	3.01	2.87
Mean commute (minutes)	38	33
Median year structure built	1961	1958