Land for sale in Mississippi's Jackson County recently totaled around $224 million and almost 6,000 acres. Jackson County ranks second out of 82 counties in the Magnolia State for the combined amount of land currently advertised for sale. Of all farms, hunting land and other rural land and acreage for sale in Jackson County, Ocean Springs had the most land for sale. From an economic perspective, manufacturing and related services are the main sectors in Jackson County. Jackson County is the largest county in Mississippi (1,043 square miles). It's located in the Coastal Mississippi region of the state.