James "Jamie" Dimon (born March 13, 1956) is an American business executive. He is the current chairman, president and chief executive officer of JPMorgan Chase, one of the Big Four banks of the United States, and has served as a Class A director of the Board of Directors of the New York Federal Reserve since January 2007. Dimon was named to Time magazine's 2006, 2008, 2009, and 2011 lists of the world's 100 most influential people. He was also named to Institutional Investor's Best CEOs list in the All-America Executive Team Survey from 2008 through 2011. He was named the CEO of the Year in 2011.

He received a $23 million pay package for fiscal year 2011, more than any other bank CEO in the United States.