Frank Duncan
Frank Duncan may refer to:
Sports
- Frank Duncan (American football), American football player
- Frank Duncan (catcher), American baseball player and manager in the Negro leagues from 1920 to 1948
- Frank Duncan (outfielder), American baseball player and manager in the Negro leagues
- Frank Duncan (pitcher), American baseball player in the Negro leagues from 1941 to 1945
Others
- Frank I. Duncan, American politician, lawyer, judge and newspaper publisher