The value of all farms, rural land, hunting land and other land for sale in DeKalb County recently was nearly $93 million, representing a combined 2,641 acres of land for sale in DeKalb County. DeKalb County ranks 24th out of 95 counties in the Volunteer State for the total acreage of land currently advertised for sale. Of all locations in DeKalb County with farms and rural real estate for sale, Smithville featured the most land for sale. From an economic perspective, manufacturing and related services are the main sectors in DeKalb County. DeKalb County is the 70th biggest county (328 square miles) in Tennessee. It's located in the East Central Tennessee region of the state.