Mason is located in Illinois. Mason, Illinois has a population of 301. Mason is more family-centric than the surrounding county with 41.18% of the households containing married families with children. The county average for households married with children is 33.12%.
The median household income in Mason, Illinois is $55,114. The median household income for the surrounding county is $65,590 compared to the national median of $69,021. The median age of people living in Mason is 38.7 years.
The average high temperature in July is 87.5 degrees, with an average low temperature in January of 21.4 degrees. The average rainfall is approximately 43.9 inches per year, with 15.4 inches of snow per year.
