Mason City is located in Illinois. Mason City, Illinois has a population of 2,205. Mason City is more family-centric than the surrounding county with 28.52% of the households containing married families with children. The county average for households married with children is 26.57%.
The median household income in Mason City, Illinois is $50,625. The median household income for the surrounding county is $54,415 compared to the national median of $69,021. The median age of people living in Mason City is 47 years.
The average high temperature in July is 84.9 degrees, with an average low temperature in January of 17.1 degrees. The average rainfall is approximately 37.7 inches per year, with 15.1 inches of snow per year.
