‘- Arroyo Grande is a city in San Luis Obispo County, California, United States. The 93420 zip code is located in the Arroyo Grande community of California in San Luis Obispo county. You can learn more about Real Estate in Arroyo Grande CA 93420 below, including current Homes For Sale: Condos, Townhomes, Foreclosures and Bank Owned Properties, Short Sales and more. Our Local Arroyo Grande CA Realtors can assist you with selling your home in California or buying your next piece of Real Estate in or around the Arroyo Grande CA 93420 community. Be sure to check out our FREE Instant Home Value wizard to get a quick report on your homes current estimated value.