Lee Herbert Hamilton (born April 20, 1931) is a former member of the United States House of Representatives and currently a member of the U.S. Homeland Security Advisory Council. A member of the Democratic Party, Hamilton represented the 9th congressional district of Indiana from 1965 to 1999. Following his departure from Congress he has served on a number of governmental advisory boards, most notably as the vice chairman of the 9/11 Commission.
Born in Daytona Beach, Florida, Lee Hamilton graduated from DePauw University in 1952, where he was a member of the Alpha Tau Omega fraternity, and from the Indiana University School of Law - Bloomington in 1956. He worked as a lawyer in private practice for the next ten years.
Hamilton was elected to the House of Representatives as a Democrat as part of the national Democratic landslide of 1964. He chaired many committees during his tenure in office, including the House Committee on Foreign Affairs, the U.S. House Permanent Select Committee on Intelligence, the Joint Committee on Printing, and others. As chairman of the Select Committee to Investigate Covert Arms Transactions with Iran, Hamilton chose not to investigate President Ronald Reagan or President George H. W. Bush, stating that he did not think it would be "good for the country" to put the public through another impeachment trial. He remained in Congress until 1999; at the time he was one of two surviving members of the large Democratic freshman class of 1965 (the other being John Conyers).