In 2017, Clark County, IL had a population of 15.9k people with a median age of 43 and a median household income of $52,068. Between 2016 and 2017 the population of Clark County, IL declined from 16,089 to 15,924, a -1.03% decrease and its median household income grew from $48,693 to $52,068, a 6.93% increase.
The population of Clark County, IL is 96.7% White Alone, 1.5% Hispanic or Latino, and 1.02% Two or More Races. 1.88% of the people in Clark County, IL speak a non-English language, and 99.3% are U.S. citizens.
The median property value in Clark County, IL is $87,400, and the homeownership rate is 74.3%. Most people in Clark County, IL commute by Drove Alone, and the average commute time is 21.3 minutes. The average car ownership in Clark County, IL is 2 cars per household.