In 2019, Clark County, IL had a population of 15.7k people with a median age of 42.3 and a median household income of $56,531. Between 2018 and 2019 the population of Clark County, IL declined from 15,836 to 15,716, a −0.758% decrease and its median household income grew from $54,158 to $56,531, a 4.38% increase.
The 5 largest ethnic groups in Clark County, IL are White (Non-Hispanic) (96.5%), Two+ (Non-Hispanic) (0.681%), Black or African American (Non-Hispanic) (0.668%), Other (Hispanic) (0.585%), and Two+ (Hispanic) (0.522%). 0% of the households in Clark County, IL speak a non-English language at home as their primary language.
99.1% of the residents in Clark County, IL are U.S. citizens.
In 2019, the median property value in Clark County, IL was $92,500, and the homeownership rate was 76.6%. Most people in Clark County, IL drove alone to work, and the average commute time was 22.5 minutes. The average car ownership in Clark County, IL was 2 cars per household.