A total of approximately 4,000 acres were listed for sale in Johnson County, Arkansas, recently, representing a total value of nearly $81 million in Johnson County ranches, farms, hunting land and other rural land and acreage for sale. Johnson County ranks 27th out of 75 counties in the Wonder State for the combined amount of land currently advertised for sale. Clarksville featured the most land for sale. Manufacturing and related services are the largest economic sectors in Johnson County. Johnson County is Arkansas's 33rd largest county (682 square miles). It's located in the River Valley Arkansas region of the state.