Costco Wholesale is located at 9404 Central Ave, Montclair, CA. This business specializes in Auto Parts, Furniture, Pharmacies and Grocery Stores. Costco Wholesale is open Mon, Closed; Tue, Closed; Wed, Closed; Thu, Closed; Fri, Closed; Sat, 11am-8:05pm; Sun, 9:05am-6pm and accepts Mastercard and Visa.