In 2019, Clay County, IL had a population of 13.3k people with a median age of 42.6 and a median household income of $48,500. Between 2018 and 2019 the population of Clay County, IL declined from 13,338 to 13,287, a −0.382% decrease and its median household income declined from $48,691 to $48,500, a −0.392% decrease.
The 5 largest ethnic groups in Clay County, IL are White (Non-Hispanic) (96.1%), Two+ (Non-Hispanic) (2.43%), Black or African American (Non-Hispanic) (0.805%), Asian (Non-Hispanic) (0.316%), and American Indian & Alaska Native (Non-Hispanic) (0.241%). 0% of the households in Clay County, IL speak a non-English language at home as their primary language, and 99.9% of the residents in Clay County, IL are U.S. citizens.
In 2019, the median property value in Clay County, IL was $84,500, and the homeownership rate was 74.5%. Most people in Clay County, IL drove alone to work, and the average commute time was 20.7 minutes. The average car ownership in Clay County, IL was 2 cars per household.