Robert Duffy

Robert, Rob, Bob, or Bobby Duffy may refer to:


 * Robert Duffy (politician) (born 1954), Lieutenant Governor of New York
 * Robert Duffy (footballer) (born 1982), Welsh footballer
 * Robert Duffy (American football) (1903–1974), Dickinson College football coach (1927–28)
 * Bob Duffy (basketball, born 1922) (1922–1978), American basketball player in the BAA
 * Bob Duffy (basketball, born 1940), American basketball player in the NBA
 * Bobby Duffy (died 1992), Irish soccer player
 * Robert Duffy (businessman) (born 1954), American businessman
 * Robert Duffy (programmer) (born 1964), American video game programmer