Allan Arthur Montreuil (August 23, 1943 – January 18, 2008) was an American Major League Baseball second baseman who appeared in five games for the 1972 Chicago Cubs. Montreuil was listed as 5 feet 5 inches (1.65 m) tall and 158 pounds (72 kg). He threw and batted right-handed. A graduate of De La Salle High School in New Orleans, Montreuil attended Loyola University before being signed by the Boston Red Sox in 1964. He was sent to the Cubs in 1969 after spending almost four full years at the Double-A level in the Boston organization.