William Egan Colby (4 Januari 1920 – 27 April 1996) merupakan seorang intelijen di Amerika Serikat, yang menjabat sebagai Direktur CIA (DCI) dari bulan September 1973 sampai Januari 1976. Colby menjabat sebagai DCI pada masa PresidenRichard Nixon dan Presiden Gerald Ford dan digantikan oleh George H. W. Bush (yang pada kemudian hari menjadi presiden) pada tanggal 30 Januari 1976.
Bibliografi
Colby, William (1975). Intelligence and the press: Address to the Associated Press annual meeting by William E. Colby on Monday, 7 April 1975. CIA (1975).
Colby, William (1975). Foreign intelligence for America: Address to the Commonwealth Club of California by William E. Colby on Wednesday, 7 May 1975 in San Francisco, California. CIA (1975).
Colby, William (1975). Director of Central Intelligence press conference: CIA Headquarters auditorium, 19 November 1975. CIA (1975).
Colby, William (1986). The increased role of modern intelligence: A public speech on February 21, 1986 in Taipei (AWI lectures). Asia and World Institute (1986).
Garthoff, Douglas (2005). Directors of Central Intelligence as Leaders of the U.S. Intelligence Community, 1946-2005. Central Intelligence Agency. ISBN1-929667-14-0.
Ford, Harold (1993). William E. Colby as Director of Central Intelligence. Central Intelligence Agency. Declassified CIA History Staff history of Colby's tenure as DCI.