William Hedgcock Webster is an American retired attorney and jurist who most recently served as chair of the Homeland Security Advisory Council from 2005 until 2020. He was a United States district judge of the United States District Court for the Eastern District of Missouri and a United States circuit judge of the United States Court of Appeals for the Eighth Circuit before becoming director of the Federal Bureau of Investigation (FBI) from 1978 to 1987 and director of Central Intelligence (CIA) from 1987 to 1991. He is the only person to have held both positions.

The director of the Federal Bureau of Investigation is the head of the Federal Bureau of Investigation, a United States federal law enforcement agency, and is responsible for its day-to-day operations. The FBI director is appointed for a single 10-year term by the president of the United States and confirmed by the Senate. The FBI is an agency within the Department of Justice (DOJ), and thus the director reports to the attorney general of the United States.