Robert Duffy
Robert, Rob, Bob, or Bobby Duffy may refer to:
- Robert Duffy (politician), Lieutenant Governor of New York
- Robert Duffy (footballer), Welsh footballer
- Robert Duffy (American football), Dickinson College football coach
- Bob Duffy (basketball, born 1922), American basketball player in the BAA
- Bob Duffy (basketball, born 1940), American basketball player in the NBA
- Bobby Duffy, Irish soccer player
- Robert Duffy (businessman), American businessman
- Robert Duffy (programmer), American video game programmer