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All Clark County population data above are from the US Census Bureau.
The population data for Clark County are from the Census 2000, Census 2010, the Census' American Community Survey 2015 5-year estimates and the Census' 2016 Population Estimates. The demographic data for Bureau County, Mercer County, Richland County, and Stark County are the most current, comparable demographics available from the US Census Bureau, are from the American Community Survey 2015 5-year estimates, and were downloaded on December 2016. Check out our FAQ section for more details.
With 15,938 people, Clark County is the 70th most populated county in the state of Illinois out of 102 counties. But watch out, Clark County, because Mercer County with 15,730 people and Richland County with 15,930 people are right behind you.
The largest Clark County racial/ethnic groups are White (96.9%) followed by Hispanic (1.4%) and Two or More (0.9%).
In 2015, the median household income of Clark County residents was $50,517. Clark County households made slightly more than Bureau County households ($50,423) and Stark County households ($50,085) . However, 14.9% of Clark County residents live in poverty.
The median age for Clark County residents is 43.4 years young.
86% of people CANNOT find the data they're looking for on the US Census Bureau website. Source: Nielsen Norman Group
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