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.

Andrew George McCabe is an American attorney who served as the Deputy Director of the Federal Bureau of Investigation (FBI) from February 2016 to March 2018 and as the acting Director of the FBI from May 9, 2017, to August 2, 2017. He also serves as a professor at George Mason University's Schar School of Policy and Government. McCabe joined the FBI as a special agent in 1996 and served with the bureau's SWAT team. He became a supervisory special agent in 2003 and held management positions of increasing responsibility until he was appointed deputy director of the FBI in February 2016. McCabe became the acting Director of the FBI following James Comey's dismissal by then President Donald Trump, and served in that position until Trump's appointment of Christopher A. Wray. McCabe later departed from the FBI on poor terms with Trump. After leaving the Trump administration, McCabe has been a contributor at CNN since 2019.