Riverside County is a large county in Southern California that stretches from the L.A. sprawl across Palm Springs into the desert around Joshua Tree National Park. The county was recently?ranked third in population growth among large counties nationwide, according to a U.S. Census Bureau report. The combined value of land and rural real estate for sale in California's Riverside County recently on Land.com was nearly $4 billion. This represents around 100,000 acres of farms and ranches for sale in Riverside County. Riverside County is among the top 10 counties in the U.S. with the most land currently for sale. Riverside County ranks third in California based on the total amount of acres of land for sale of all the counties in the Golden State. Of all land for sale in Riverside County, Palm Springs had the most land for sale. Based on its natural assets, tourism and recreation are important contributors to the Riverside County economy. Riverside County is one of the ten largest counties in California (7,303 square miles). It's located in the Deserts California region of the state.