Roger Blaine Porter (born June 19, 1946) is an American professor currently serving as the IBM Professor of Business and Government at Harvard University. He was the master of Dunster House, one of the twelve undergraduate houses or colleges at Harvard. He is also a senior scholar at the Woodrow Wilson International Center for Scholars in Washington, D.C. He is on the board of directors of Zions Bancorporation, a large bank holding company headquartered in Salt Lake City, Utah.