The population of Clark county is estimated at 15,848. In 2017 there were 176 births and 206 deaths in Clark county. Clark county has 2,857 housing units that are owned with a mortgage or a loan, 2,303 that are owned free and clear and 1,622 that are renter occupied.

  The good residents of Clark County filed 7,500 federal tax returns in 2017. This amount represents 0.1% of all Illinois filings and 0.005% of the entire nation. Clark had a combined total federal tax liability of $53,269,000 on earned income of $388,707,000. Other notable statistics from Clark County were 430 unemployment claims which collected a total of $1,938,000 and 900 charitable contributions valued at $5,690,000. 1,140 filings from Clark County paid a combined total of $3,566,000 in property taxes and 820 filings paid $3,724,000 on mortgage interest costs.

  In 2010 Clark county had 50 religious congregations with an estimated 10,354 members.
17.1% of the Clark population has a college level Bachelors degree or higher. 8.5% have less than a highschool diploma level education.

Approximately 49% of Clark County voted in the presidential election of 2016. This represents a decrease from the 2012 election by 24 votes.
At $55,205 the median income is 87.6% of the Illinois average. An estimated 375 people claimed to be unemployed last year in Clark, the equivalant of around 4.8% of the county population. This represents a decrease in the level of unemployment from the previous year's value of 5.8%.

Top 15 Industries in Clark County.
Total # Employed	Industry Job Type
1,004	Manufacturing
446	Accommodation and food services
445	Retail trade
436	Food services and drinking places
417	Restaurants and other eating places
375	Health care and social assistance
283	Administrative and support and waste management and remediation services
266	Limited-service restaurants
191	Wholesale trade
90	Professional, scientific, and technical services
86	Transportation and warehousing
78	Farm supplies merchant wholesalers
78	Farm supplies merchant wholesalers- farm dealers
70	Gasoline stations
64	Motor vehicle and parts dealers

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