Of 64 counties in the Mile High State, Rio Blanco County is sixth in terms of its size (3,222 square miles). Rio Blanco County is in Northwest Colorado. There is nearly 1,000 acres of ranches for sale in Rio Blanco County, Colorado, based on recent Land Network data. The combined market value of farms and ranches for sale here is about $2 million. Browse all Rio Blanco 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 Rio Blanco County is house.