Gerre Edward Hancock (February 21, 1934 – January 21, 2012) was an American organist, improviser, and composer. Hancock was Professor of Organ and Sacred Music at the University of Texas at Austin. He died of cardiac arrest in Austin, Texas, on Saturday, January 21, 2012. Hancock's compositions are published by Oxford University Press (OUP). His textbook, Improvising: How to Master the Art, also published by OUP, is studied by organists throughout the United States.