The value of farms and ranches for sale in Colorado's Rio Blanco County recently on Land.com was $56 million. This represents around 100,000 acres of farms, ranches, and rural real estate for sale in Rio Blanco County. Rio Blanco County ranks 45th out of 64 counties in the state for the total number of acres of land currently advertised for sale. Meeker had the most land for sale. Economically speaking, Rio Blanco County's is largely dependent on mining and mineral extraction-related businesses and services. Rio Blanco County is one of the ten biggest counties in Colorado (3,222 square miles). It's located in the Northwest Colorado region of the state.