In 2020, Clay County, IL had a population of 13.2k people with a median age of 42.1 and a median household income of $52,167. Between 2019 and 2020 the population of Clay County, IL declined from 13,287 to 13,217, a −0.527% decrease and its median household income grew from $48,500 to $52,167, a 7.56% increase.
The 5 largest ethnic groups in Clay County, IL are White (Non-Hispanic) (96%), Two+ (Non-Hispanic) (2.53%), Asian (Non-Hispanic) (0.545%), Black or African American (Non-Hispanic) (0.439%), and American Indian & Alaska Native (Non-Hispanic) (0.25%).
None of the households in Clay 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.
99.9% of the residents in Clay County, IL are U.S. citizens.
In 2020, the median property value in Clay County, IL was $84,400, and the homeownership rate was 74.3%. Most people in Clay County, IL drove alone to work, and the average commute time was 24.2 minutes. The average car ownership in Clay County, IL was 2 cars per household.