Roy David McMillan (July 17, 1929 – November 2, 1997) was a shortstop, coach and manager in Major League Baseball. From 1951 through 1966, McMillan played for the Cincinnati Reds (1951–60), Milwaukee Braves (1961–64) and New York Mets (1964–66). He batted and threw right-handed. Following his retirement as a player, McMillan managed the Milwaukee Brewers (1972) and New York Mets (1975). He was born in Bonham, Texas.