South River is a medium-sized borough located in the state of New Jersey. With a population of 15,931 people and three associated neighborhoods, South River is the 121st largest community in New Jersey.

Also of interest is that South River has more people living here who work in computers and math than 95% of the places in the US.

One downside of living in South River, however, is that residents on average have to contend with a long commute, spending on average 30.50 minutes every day commuting to work.

The overall education level of South River citizens is substantially higher than the typical US community, as 31.14% of adults in South River have at least a bachelor's degree, and the average American community has 21.84%.

The per capita income in South River in 2022 was $42,195, which is lower middle income relative to New Jersey, and upper middle income relative to the rest of the US. This equates to an annual income of $168,780 for a family of four. However, South River contains both very wealthy and poor people as well.

South River is an extremely ethnically-diverse borough. The people who call South River home describe themselves as belonging to a variety of racial and ethnic groups. The greatest number of South River residents report their race to be White, followed by Black or African-American. South River also has a sizeable Hispanic population (people of Hispanic origin can be of any race). People of Hispanic or Latino origin account for 26.66% of the borough’s residents. Important ancestries of people in South River include Italian, Polish, Portuguese, Irish, and Greek.

Foreign born people are also an important part of South River's cultural character, accounting for 24.81% of the borough’s population.

The most common language spoken in South River is English. Other important languages spoken here include Spanish and Portuguese.