List of Costco Stores in Grafton, WI Outlet Note Regular Brands Costco Wisconsin Grafton Rating 4.7 based on 76 votes Official Website http://www.costco.com/ Products Handbags Clothing Furniture Jewelry Appliances Electronics Office Products NameAddressPhone Name/Address/Phone Costco outlet - Grafton 950 Port Washington Rd (262) 204-1050 People Also Viewed