Lee Herbert Hamilton (April 20, 1931 – February 3, 2026) was an American politician and lawyer from Indiana. He was a member of the United States House of Representatives and 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 served on a number of governmental advisory boards, most notably as the vice chairman of the 9/11 Commission.