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 and corporate banking arm of financial services giant Citigroup, one of the largest companies in the world. As of March 2007, it is the largest bank in the United States by holdings.
Citibank has 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, Miami, and Washington DC metropolitan areas, as well as in California.
In addition to the standard banking transactions, Citibank offers insurance, credit card and investment products. Their online services division is among the most successful in the field, claiming about 15 million users.