Clark County index was founded in the year 1818 and named after General George Rogers Clark. The territory covers an area of 402.53 sq mi. More than 0.14 million people with an intermingling cohabitation of White, Native American, black or African American, Asian, Hispanic or Latino, Pacific Islander, and others reside in this region along with 56K households and 39K family units. Springfield is the county seat and largest city.

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