Plainfield is located in Illinois. Plainfield, Illinois has a population of 42,203. Plainfield is more family-centric than the surrounding county with 50% households with children. The county percentage for households with children is 37%.
The median household income in Plainfield, Illinois is $124,173. The median household income for the surrounding county is $82,984 compared to the national median of $61,963. The median age of people living in Plainfield is 35.3 years.
The average high temperature in July is 84.32 degrees, with an average low temperature in January of 11.41 degrees. The annual precipitation is 37.96.