Map for Costco Wholesale Search | Advanced Search | New Members | Coupons and Discounts | All Categories Shopping & Specialty Retail >> Retail Costco Wholesale 1540 Froom Ranch Wy.San Luis Obispo, CA 93405 | directions (805) 541-7000 | fax: (805) 541-7021 Visit Site If your business isn't here, contact us today to get listed!