Reuben Jeffery III (born August 21, 1953) is the former United States Under Secretary of State for Economic, Business, and Agricultural Affairs, having been appointed to that position by United States President George W. Bush in June 2007. Presently, Reuben Jeffery III is the President, Chief Executive Officer and member of the board of Rockefeller & Co. and Rockefeller Financial Services, Inc. He is a member of the International Advisory Committee of J. Rothschild Capital Management Limited.