Mason is located in Illinois. Mason, Illinois has a population of 301. Mason is less family-centric than the surrounding county with 24% households with children. The county percentage for households with children is 28%.
The median household income in Mason, Illinois is $52,571. The median household income for the surrounding county is $59,636 compared to the national median of $66,222. The median age of people living in Mason is 42.1 years.
The average high temperature in July is 86.9 degrees, with an average low temperature in January of 17.8 degrees. The annual precipitation is 42.05.