Who are Costco's competitors?

Answer by  addy77 (13)

Sam's Club which is owned by Wal-Mart is Costco's primary competitor. Depending on your area BJ's Wholesale is another similar warehouse club type business. Target also now offers a section with larger serving packages in several aisles at their stores. The difference would be that there is no annual membership at Target.

Answer by  cinnamon01 (30)

Their main competitor is Sam's Club; however, any other grocery store could be considered competition if people do not want to buy in bulk.