Lawrence Patrick David Gillick (born August 22, 1937) is an American professional baseball executive, currently serving as the president of the Philadelphia Phillies of Major League Baseball (MLB). He previously served as the general manager of four MLB teams: the Toronto Blue Jays (1978–94), Baltimore Orioles (1996–98), Seattle Mariners (2000–03), and Phillies (2006–08). He guided the Blue Jays to World Series championships in 1992 and 1993, and later with the Phillies in 2008.

He won a national championship in college while pitching for the University of Southern California (USC). Gillick was inducted into the Canadian Baseball Hall of Fame in 1997, the National Baseball Hall of Fame on July 24, 2011, and the Ontario Sports Hall of Fame in 2013.