Citibank South Dakota is part of the Citigroup of businesses. Citigroup, the leading global financial services company has some 200 million customer accounts and does business in more than 100 countries, providing consumers, corporations, governments and institutions with a broad range of financial products and services, including consumer banking and credit, corporate and investment banking, securities brokerage, and wealth management. Citibank is the largest national issuer of credit cards with card membership in all 50 states. Major brand names under Citigroup's trademark red umbrella include Citibank, CitiFinancial, Primerica, Smith Barney and Banamex. Citigroup is headquartered in New York City.