Directions to 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 | map (805) 541-7000 | fax: (805) 541-7021 Visit Site Get directions to: Costco Wholesale, 1540 Froom Ranch Wy., San Luis Obispo CA Get directions from: Click to Print This Page If your business isn't here, contact us today to get listed!