Chatham is located in Illinois. Chatham, Illinois has a population of 12,749. Chatham is more family-centric than the surrounding county with 40.84% of the households containing married families with children. The county average for households married with children is 27.08%.
The median household income in Chatham, Illinois is $81,402. The median household income for the surrounding county is $58,687 compared to the national median of $57,652. The median age of people living in Chatham is 35.5 years.
The average high temperature in July is 85.3 degrees, with an average low temperature in January of 17.4 degrees. The average rainfall is approximately 38.4 inches per year, with 20.9 inches of snow per year.
