The value of all farms and ranches for sale in Napa County, California, recently was approximately $652 million, representing a total of 3,867 acres of land for sale in Napa County. Napa County ranks 29th in the Golden State for the combined amount of land currently advertised for sale. Of all locations in Napa County with land and rural real estate for sale, Napa featured the most land for sale. Based on its natural assets, Napa County's economy is dependent on tourism and recreation. Napa County is California's 51st largest county (788 square miles). It's located in the North Coast California region of the state.