If you're here looking up Costco customer care, you probably already know who they are. But it helps to get an idea of how big they are and what their support operation looks like if you are a customer. Costco also goes by or is associated with the names Costco.com, Costco Wholesale Corporation, Costco Wholesale. They are considered to be part of the following sectors and industries: retail, Consumer Discretionary, Retailing. Costco is associated with terms like merchandise, cash & carry, warehouse club, public, retail, e-commerce, b2c, wholesale by their customers and industry analysts. Their competition, in the eyes of customers, are companies like BJ's, Amazon, Walmart, Sam's Club. They employ 126,000 people according to customers in the know.