Connie Mack III, American lawyer and politician
Cornelius Alexander McGillicuddy III (born October 29, 1940), known professionally as Connie Mack III, is an American retired Republican politician. He served as a member of the United States House of Representatives from Florida from 1983 to 1989 and then as a Senator from 1989 to 2001. He served as chair of the Senate Republican Conference from 1997 to 2001.

He was considered for the Republican vice-presidential nomination by Bob Dole in 1996 and George W. Bush in 2000. Jack Kemp and Dick Cheney, respectively, were chosen instead. He is the grandson of Connie Mack (1862–1956), former owner and manager of baseball's Philadelphia Athletics and a member of the Baseball Hall of Fame.