South River Flag

South River

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.

15.9K
Total Population
5,692
Density (mi²)
-40 -0.25%
Growth

South River Population

South River Population

Data after 2023 is projected based on recent change

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)
White9,29858.09%
Other race2,56716.04%
Black or African American1,88611.78%
Two or more races1,3948.71%
Asian6814.25%
Native American1510.94%
Native Hawaiian or Pacific Islander300.19%

South River Marital Status

OverallMalesFemales0%10%20%30%40%50%60%70%80%90%100%

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

Nearby Cities

Sources

  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)