The Deputy Director of the Federal Bureau of Investigation is a senior United States government position in the Federal Bureau of Investigation. The office is second in command to the Director of the Federal Bureau of Investigation. If the director is absent or the position is vacant, the deputy director automatically takes on the additional title and role of acting director. The office is also the highest position attainable within the FBI without being appointed by the President of the United States. Responsibilities as deputy director include assisting the director and leading prominent investigations. All other FBI executives and special agents in charge report to the director through the deputy director. From 1978 to 1987, the position of deputy director was not filled due to William Hedgcock Webster's decision to divide the deputy's responsibility between three 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.