South River

County:: Middlesex County
County Seat:: No
Area (mi²):: 2.785
State:: New Jersey

South River is a borough located in Middlesex County, New Jersey. South River has a 2025 population of 15,851. South River is currently declining at a rate of -0.25% annually and its population has decreased by -1.25% since the most recent census, which recorded a population of 16,051 in 2020.

The average household income in South River is $120,913 with a poverty rate of 11.3%.The median age in South River is 36.5 years: 35.6 years for males, and 37.6 years for females.

Demographics

The racial composition of South River includes 58.09% White, 16.04% other race, 11.78% Black or African American, 4.25% Asian, and smaller percentages for Native American, Native Hawaiian or Pacific Islander and multiracial populations.

Population by Race

Race	Population	Percentage (of total)
White	9,298	58.09%
Other race	2,567	16.04%
Black or African American	1,886	11.78%
Two or more races	1,394	8.71%
Asian	681	4.25%
Native American	151	0.94%
Native Hawaiian or Pacific Islander	30	0.19%

South River Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

South River's average per capita income is $56,234. Household income levels show a median of $101,853. The poverty rate stands at 11.3%.

Families: A family includes the owner or renter of the home along with everyone related to them - whether through birth, marriage, or adoption. This includes relatives like spouses, children, parents, siblings, grandparents, and any other family members.

Households: A household includes all the people who occupy a housing unit (such as a house or apartment) as their usual place of residence.

Non Families: A nonfamily household is either someone living alone or when the owner/renter lives with people they aren't related to, like roommates.

Name	Median	Mean
Married Families	$129,102	-
Families	$116,548	$129,588
Households	$101,853	$120,913
Non Families	$63,269	$90,117

$56,234

Average Income

$101,853

Median Household Income

11.3%

Poverty Rate