George Decatur Fallon (July 8, 1914 – October 25, 1994) was an American backup second baseman/shortstop in Major League Baseball who played for the Brooklyn Dodgers (1937) and St. Louis Cardinals (1943-1945).

In a four-season career, Fallon posted a .216 batting average (61-for-282) with one home run and 21 RBIs in 133 games played.

One notable moment in Fallon's career—he was the first batter to face Cincinnati Reds pitcher Joe Nuxhall when the then 15-year-old Nuxhall made his major league debut on June 10, 1944.

Fallon died in Lake Worth, Florida, at age 80.

This biographical article relating to an American baseball second baseman is a stub.