From a total population of 22,623, South Plainfield has a median age of 41.7. The average age of males, in South Plainfield, is 41.5 while the average age of females is 42.2. When you compare this to median age of New Jersey, South Plainfield is 2.4 years older.
The median income of individuals, in South Plainfield, is $37,211 while the average household income is $90,880. When comparing the median income of people living in South Plainfield to the rest of New Jersey, the average income in South Plainfield is $852 more.