There was a combined $136 million of ranches, farms, hunting land and other rural land and acreage for sale in Idaho's Boise County recently on Land.com. The total of all Boise County farms and ranches for sale was approximately 3,000 acres. Boise County ranks 14th in Idaho for the combined amount of land currently advertised for sale. Among cities in Boise County with land and rural real estate for sale, Boise featured the most land for sale. From an economic perspective, government and state-level services contribute most to Boise County's overall GDP. Boise County is the 15th largest county (1,906 square miles) in Idaho. It's located in the Southwestern Idaho region of Idaho.