Citibank is a major international bank, founded in 1812 as the City Bank of New York, later First National City Bank of New York. Citibank is now the consumer banking arm of financial services giant Citigroup, one of the largest companies in the world. As of June 2009, Citigroup is the third largest bank holding company in the United States by total assets.

Citibank has retail banking operations in more than 100 countries and territories around the world. More than half of its 1,400 offices are in the United States, mostly in the New York City, Chicago, Los Angeles, San Francisco/Silicon Valley, and Miami. More recently, Citi has expanded to include the Boston, Philadelphia, Houston, Dallas, and Washington D.C. metropolitan areas, albiet with a mixed record of success.

It was reported that Citigroup executives were pleased with the performance of the Boston branches, but were less impressed with the Philadelphia experiment, according to a person familiar with the situation.

As a result of the Global financial crisis of 2008–2009 and huge losses in the value of its subprime mortgage assets, Citibank was rescued by the U.S. government under plans agreed for Citigroup. On November 23, 2008, in addition to initial aid of $25 billion, a further $25 billion was invested in the corporation together with guarantees for risky assets amounting to $306 billion.

In the 1960s the bank entered into the credit card business. In 1965, First National City Bank bought Carte Blanche from Hilton Hotels. However after three years, the bank (under pressure from the U.S. government) was forced to sell this division. By 1968, the company created its own credit card.

The card, known as "The Everything Card," was promoted as a kind of East Coast version of the BankAmericard. By 1969, First National City Bank decided that the Everything Card was too costly to promote as an independent brand and joined Master Charge (now MasterCard). Citibank unsuccessfully tried again in 1977–1987 to create a separate credit card brand, the Choice Card.

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