Plainfield Real EstatePlainfield is located in Illinois. Plainfield, Illinois has a population of 41,978. Plainfield is more family-centric than the surrounding county with 56.69% of the households containing married families with children. The county average for households married with children is 39.47%. The median household income in Plainfield, Illinois is $121,746. The median household income for the surrounding county is $80,782 compared to the national median of $57,652. The median age of people living in Plainfield is 34.9 years. Plainfield WeatherThe average high temperature in July is 84 degrees, with an average low temperature in January of 15.8 degrees. The average rainfall is approximately 38.5 inches per year, with 29.6 inches of snow per year. Plainfield MapReal estate near PlainfieldNearby CitiesNearby Cities Homes for Sale |