South Plainfield is located in New Jersey. South Plainfield, New Jersey has a population of 24,472. South Plainfield is less family-centric than the surrounding county with 32% households with children. The county percentage for households with children is 33%.
The median household income in South Plainfield, New Jersey is $102,893. The median household income for the surrounding county is $91,657 compared to the national median of $66,222. The median age of people living in South Plainfield is 42.3 years.
The average high temperature in July is 86.6 degrees, with an average low temperature in January of 21.5 degrees. The annual precipitation is 49.63.