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 2026 population of 16,392. South River is currently growing at a rate of 1.41% annually and its population has increased by 2.13% since the most recent census, which recorded a population of 16,050 in 2020.

16.4K
Total Population
5,886
Density (mi²)
228 1.41%
Growth

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)