Source: Giving USA Foundation
A 2006 survey found that 3.1 percent of U.S. households – high net-worth individuals with incomes exceeding $200,000 per year or assets in excess of $1,000,000 – are responsible for nearly two-thirds of all charitable giving.
Source: Bank of America Study of High Net-Worth Philanthropy
The largest charitable contribution in 2007 was Leona Helmsley's bequest of $4 billion to the Leona M. and Harry B. Helmsley Charitable Trust. The next largest contributions in 2007 were from Barron Hilton ($1.2 billion), Jon M. and Karen Huntsman ($627 million), and T. Denny Sanford ($502.6 million).
Source: The 2007 Slate 60