North Fork Bank was an American bank that operated from 1950 until 2008 when it was acquired Capital One Bank and was merged into that bank. In November 2007, it had 365 branches in the New York metropolitan area.^[1]

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North Fork early history was dominated by mergers of banks on the North Fork, Suffolk County, New York. Its earliest component was Southold Savings Bank in Southold, New York (although the company dates its history from 1905 with the founding of Mattituck Bank in Mattituck, New York, which would become the most active early partner).

It first assumed the name of North Fork Bank & Trust Company in 1950 through the consolidation of Mattituck and First National Bank of Cutchogue in Cutchogue, New York. North Fork Bancorporation was formed in 1980 and Southold Savings was acquired in 1988.

In the 1990s, it began an aggressive move into New York City market with the acquisition of

At the time of its acquisition, the bank served the New York City metropolitan area with over 350 branches and around $60 billion in assets.^[1] The bank specialized in commercial banking. North Fork Bank CEO John Kanas incorporated the bank in 1980, joined Capital One with the 2006 acquisition, and in 2007, stepped down from his position as Capital One's head of banking.^{[citation needed]}

The bank's reporting of unusual transactions made by then-New York Governor Eliot Spitzer led to the criminal investigation that led to the Governor stepping down in March 2008.^[6]