Frank Duncan

Frank Duncan may refer to:

Sports

 * Frank Duncan (American football) (born 1956), American football player
 * Frank Duncan (catcher) (1901–1973), American baseball player and manager in the Negro leagues from 1920 to 1948
 * Frank Duncan (outfielder) (1888–1958), American baseball player and manager in the Negro leagues
 * Frank Duncan (pitcher) (1920–1999), American baseball player in the Negro leagues from 1941 to 1945

Others

 * Frank I. Duncan (1858–1946), American politician, lawyer, judge and newspaper publisher