The overall value of farms and ranches for sale in Johnson County, Arkansas, recently on Land.com was approximately $65 million. This represents almost 4,000 acres of ranches, farms, hunting land and other rural land and acreage for sale in Johnson County. Johnson County ranks 27th in the Natural State for the total number of acres of land currently advertised for sale. Of all land for sale in Johnson County, Clarksville featured the most land for sale. From an economic perspective, manufacturing and related services are the main 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.