Of 44 counties in the Gem State, Boise County ranks 15th in terms of size (1,906 square miles). Boise County is in Southwestern Idaho. There is around 1,000 acres of ranches for sale in Boise County, Idaho, based on recent Land Network data. The combined market value of ranches, farms, hunting land and other rural land and acreage for sale here is almost $2 million. Browse all Boise County ranches for sale on the Land Network to find the ranch that's right for your business or commercial needs, from the sprawling legacy ranch to unbelievable residential ranch for your second home, investment property or retirement nest egg. The most common type of land for sale by combined acreage in Boise County is undeveloped land.