David Arthur Haycock (September 4, 1916 – February 25, 1994) was a personal secretary to several twentieth-century presidents of The Church of Jesus Christ of Latter-day Saints (LDS Church), including George Albert Smith, Joseph Fielding Smith, Harold B. Lee, Spencer W. Kimball and Ezra Taft Benson. As secretary, Haycock handled most of the correspondence and scheduled meetings for the church's president. Haycock also accompanied these leaders on their many trips throughout the world where he aided in the planning and note taking of meetings.