South Plainfield Real EstateSouth Plainfield is located in New Jersey. South Plainfield, New Jersey has a population of 24,154. South Plainfield is less family-centric than the surrounding county with 35.72% of the households containing married families with children. The county average for households married with children is 37.73%. The median household income in South Plainfield, New Jersey is $91,889. The median household income for the surrounding county is $83,133 compared to the national median of $57,652. The median age of people living in South Plainfield is 41.1 years. South Plainfield WeatherThe average high temperature in July is 86.9 degrees, with an average low temperature in January of 23 degrees. The average rainfall is approximately 48.5 inches per year, with 22.8 inches of snow per year. South Plainfield MapReal estate near South PlainfieldNearby CitiesNearby Cities Homes for Sale |