William Ramsey Clark (born December 18, 1927) is an American lawyer, activist and former public official. He worked for the U.S. Department of Justice, which included service as United States Attorney General from 1967 to 1969, under President Lyndon B. Johnson. He supervised the drafting and played an important role in the passage of the Voting Rights Act of 1965 and Civil Rights Act of 1968. Since leaving public office Clark has led many progressive activism campaigns, including opposition to the War on Terror, and he has offered legal defense to controversial figures such as Charles Taylor, Slobodan Milošević, Saddam Hussein, and Lyndon LaRouche.
Clark was born in Dallas, Texas, to Thomas Campbell Clark, who was also a United States Attorney General and a justice of the Supreme Court, and Mary Jane (née Ramsey), the daughter of a prominent Texas judge and lawyer Wiliam Franklin Ramsey. Clark served in the United States Marine Corps in 1945 and 1946, then earned a B.A. degree from the University of Texas at Austin in 1949, and an M.A. and a J.D. from the University of Chicago in 1950. While at the University of Texas he was a member of Delta Tau Delta International Fraternity.
He was admitted to the Texas bar in 1950, and to practice before the Supreme Court of the United States in 1956. From 1951 to 1961, Clark was an associate and partner in the law firm of Clark, Reed and Clark.