The value of all farms, ranches, hunting land and other land for sale in Sonoma County, California, recently was almost $974 million, representing a total of 33,942 acres of land for sale in Sonoma County. Sonoma County ranks 15th out of 58 counties in the El Dorado State for the combined amount of land currently advertised for sale. Of all locations in Sonoma County with land for sale, Santa Rosa featured the most land for sale. Based on its natural assets, tourism and recreation are important sectors for the Sonoma County economy. Sonoma County is California's 28th biggest county (1,767 square miles). It's located in the North Coast California region of California.