Of 64 counties in the state, Rio Blanco County ranks sixth by size (3,222 square miles). Rio Blanco County is in Northwest Colorado. The total value of about 16,000 acres of riverfront land recently listed for sale in Colorado's Rio Blanco County was almost $2 million. Browse all waterfront property for sale in Rio Blanco County on the Land Network to find the marina, lakefront and other recreational property that meets your needs, from waterside land perfect as a retirement investment to existing residential waterfront land and property for hunting, fishing and other outdoor-recreation pursuits! The most common type of land for sale by combined acreage in Rio Blanco County is house.