Northfield is located in Illinois. Northfield, Illinois has a population of 5,416. Northfield is more family-centric than the surrounding county with 31% households with children. The county percentage for households with children is 26%.
The median household income in Northfield, Illinois is $131,178. The median household income for the surrounding county is $63,917 compared to the national median of $61,963. The median age of people living in Northfield is 51.5 years.
The average high temperature in July is 83.2 degrees, with an average low temperature in January of 13.7 degrees. The annual precipitation is 36.8.