In 2018, Clay County, IL had a population of 13.3k people with a median age of 42.7 and a median household income of $48,691. Between 2017 and 2018 the population of Clay County, IL declined from 13,393 to 13,338, a -0.411% decrease and its median household income grew from $47,427 to $48,691, a 2.67% increase.
The 5 largest ethnic groups in Clay County, IL are White (Non-Hispanic) (96.2%), White (Hispanic) (1.44%), Two+ (Non-Hispanic) (1.42%), Black or African American (Non-Hispanic) (0.457%), and Asian (Non-Hispanic) (0.285%). 0% of the households in Clay County, IL speak a non-English language at home as their primary language, and 99.5% of the residents in Clay County, IL are U.S. citizens.
In 2018, the median property value in Clay County, IL was $81,700, and the homeownership rate was 77%. Most people in Clay County, IL drove alone to work, and the average commute time was 20.5 minutes. The average car ownership in Clay County, IL was 2 cars per household.