George Hartley McQuinn (May 29, 1910 – December 24, 1978) was an American professional baseball player. He played as a first baseman in Major League Baseball from 1936 to 1948, most notably as a member of the only St. Louis Browns team to win an American League pennant in 1944 and, as a member of the world champion 1947 New York Yankees. A seven-time All-Star, he threw and batted left-handed.