There was a combined almost $22 million of farms, ranches, hunting land and other land for sale in Idaho's Boise County recently on Land.com. The total size of all Boise County farms, ranches, hunting land and other land for sale was around 2,000 acres. Boise County ranks 28th out of 44 counties in Idaho for the total number of acres of land currently advertised for sale. Of all ranches, farms, hunting land and other rural land and acreage for sale in Boise County, Idaho City had 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 Idaho's 15th biggest county (1,906 square miles). It's located in the Southwestern Idaho region of the state.