Land for sale in Denver County, Colorado, recently totaled $5 million and approximately 1,000 acres. Denver County ranks 63rd in the Rocky Mountain State for the total number of acres of land currently advertised for sale. Among cities in Denver County with land and rural real estate for sale, Denver featured the most land for sale. Denver County is the 62nd largest county (154 square miles) in Colorado. It's located in the Denver Colorado region of the state.