Williamson is located in Illinois. Williamson, Illinois has a population of 173. Williamson is less family-centric than the surrounding county with 16.36% of the households containing married families with children. The county average for households married with children is 30.51%.
The median household income in Williamson, Illinois is $51,346. The median household income for the surrounding county is $66,882 compared to the national median of $69,021. The median age of people living in Williamson is 48.4 years.
The average high temperature in July is 88.2 degrees, with an average low temperature in January of 20.9 degrees. The average rainfall is approximately 39.9 inches per year, with 16 inches of snow per year.
