The combined value of land and rural real estate for sale in Grand County recently on Land.com was nearly $354 million. This represents nearly 100,000 acres of land and rural real estate for sale in Grand County. Grand County ranks 18th in the Rocky Mountain State based on the combined acreage of land for sale of the 64 counties in the Rocky Mountain State. Among cities in Grand County with farms and ranches for sale, Granby featured the most land for sale. Based on its natural assets, tourism and recreation contribute significant revenue toward Grand County's overall GDP. Grand County is Colorado's 21st largest county (1,869 square miles). It's located in the Northwest Colorado region of the state.