In 2020, Williamson County, IL had a population of 66.9k people with a median age of 40.9 and a median household income of $52,076. Between 2019 and 2020 the population of Williamson County, IL declined from 67,102 to 66,929, a −0.258% decrease and its median household income grew from $50,734 to $52,076, a 2.65% increase.
The 5 largest ethnic groups in Williamson County, IL are White (Non-Hispanic) (89.4%), Black or African American (Non-Hispanic) (3.94%), Two+ (Non-Hispanic) (2.53%), Asian (Non-Hispanic) (1.2%), and Other (Hispanic) (1.14%).
None of the households in Williamson County, IL reported speaking a non-English language at home as their primary shared language. This does not consider the potential multi-lingual nature of households, but only the primary self-reported language spoken by all members of the household.
99.1% of the residents in Williamson County, IL are U.S. citizens.
The largest universities in Williamson County, IL are John A Logan College (745 degrees awarded in 2020).
In 2020, the median property value in Williamson County, IL was $120,900, and the homeownership rate was 70.6%.
Most people in Williamson County, IL drove alone to work, and the average commute time was 23.1 minutes. The average car ownership in Williamson County, IL was 2 cars per household.