Mr. Bill Gates who is also the 2nd richest billionaire in the world is the richest person in America with net worth of $59 billion.Warren Buffet's net worth is $39 billion which makes him the 2nd richest person in America and 3rd richest billionaire in the world. Warren Buffet, aged at 81, is the CEO of Berkshire Hathaway.
Larry Ellison, who like Bill Gates is a college dropout, is the 6th richest person in the world and 3rd richest in America. His source of wealth is Oracle which recently acquired Taleo for $1.9 billion. The Wal-Mart ladies Christy Walton and Alice Walton are in 6th and 10th position respectively in this list America's Richest. Christy Walton is also the the richest woman in the world and that too for 7 years in a row.