As of 2014, there are 492 billionaires from the United States, according to the Christian Science Monitor. The United States provides almost one-third of the world's 1,645 billionaires, and added 50 new billionaires between 2013 and 2014.
As of 2014, the richest man in the world is Bill Gates, with a net worth of about $76 billion. Mr. Gates has been the wealthiest person on the planet over the past two decades, except for during the period 2010 to 2013, when Mexican Carlos Slim was the richest person alive. Other prominent American billionaires include Warren Buffet, Larry Ellison, Charles and David Koch, Sheldon Anderson, Christy Walton and Jim Walton. The 400 richest Americans have a combined wealth of $2 trillion, which is an increase of $300 billion from 2013.