Land for sale in Chelan County, Washington, recently totaled around $85 million and 3,000 acres. Chelan County ranks 14th in the Evergreen State for the combined amount of land currently advertised for sale. Of all locations in Chelan County with farms and ranches for sale, Chelan featured the most land for sale. Based on its natural assets, tourism and recreation are important factors in the Chelan County economy. Chelan County is one of the ten largest counties in Washington (2,994 square miles). It's located in the Cascade Range Washington region of the state.