The value of all farms, rural land, hunting land and other land for sale in Clark County recently was $7 million, representing a total of 722 acres of land for sale in Clark County. Clark County ranks 63rd out of 102 counties in the Land of Lincoln for the total acreage of land currently advertised for sale. There were three properties listed as sold in Clark County through the Land Network Comparable Sales Program. This represented a total value of $967,500. Of all land for sale in Clark County, Casey had the most land for sale. Manufacturing and related services are the largest economic sectors in Clark County. Clark County is Illinois's 54th largest county (504 square miles). It's located in the Central Illinois region of the state.