There was a combined almost $13 million of land and rural real estate for sale in Allendale County, South Carolina, recently on Land.com. The total acreage of all Allendale County farms, hunting land and other rural land and acreage for sale was almost 2,000 acres. Allendale County ranks 46th out of 46 counties in South Carolina for the combined amount of land currently advertised for sale. Allendale featured the most land for sale. Manufacturing and related services are the largest economic sectors in Allendale County. Allendale County is South Carolina's 40th largest county (412 square miles). It's located in the Low Country South Carolina region of South Carolina.