South River, New Jersey

South River, New Jersey
Aerial view of South River borough, along the banks of the namesake South River tributary of the Raritan River
Motto(s): 
"A Community With a Proud Past and a Bright Future"
Location of South River in Middlesex County highlighted in red (left). Inset map: Location of Middlesex County in New Jersey highlighted in orange (right).
Census Bureau map of South River, New Jersey
South River
Location in Middlesex County
South River
Location in New Jersey
South River
Location in the United States
Coordinates: 40°26′44″N 74°22′42″W / 40.445652°N 74.378459°W / 40.445652; -74.378459
Country United States
State New Jersey
CountyMiddlesex
IncorporatedFebruary 28, 1898
Government
  TypeBorough
  BodyBorough Council
  MayorPeter Guindi (R, term ends December 31, 2027)
  AdministratorArthur Londensky
  Municipal clerkAlyssa Guglietti
Area
  Total
2.94 sq mi (7.61 km2)
  Land2.79 sq mi (7.21 km2)
  Water0.15 sq mi (0.40 km2)  5.27%
  Rank336th of 565 in state
17th of 25 in county
Elevation
26 ft (8 m)
Population
 (2020)
  Total
16,118
  Estimate 
(2023)
15,931
  Rank164th of 565 in state
15th of 25 in county
  Density5,787.4/sq mi (2,234.5/km2)
   Rank95th of 565 in state
7th of 25 in county
Time zoneUTC−05:00 (Eastern (EST))
  Summer (DST)UTC−04:00 (Eastern (EDT))
ZIP Codes
08882
Area code(s)732
FIPS code3402369420
GNIS feature ID0885403
Websitewww.southrivernj.org

South River Belarusian: Саўт-Рывер, romanized: Sawt-Ryvyer is a borough in Middlesex County, in the U.S. state of New Jersey. As of the 2020 United States census, the borough's population was 16,118, an increase of 110 (+0.7%) from the 2010 census count of 16,008, which in turn reflected an increase of 686 (+4.5%) from the 15,322 counted in the 2000 census.

What is now South River was originally formed as the town of Washington within East Brunswick Township on February 23, 1870. South River was incorporated as an independent borough by an act of the New Jersey Legislature on February 28, 1898, replacing Washington town. It was named after the Raritan River's South River tributary, which marks the borough's eastern and northeastern boundary.