Robert Dunn or Bob Dunn may refer to:
Robert Dunn (biologist), American biologist and writer
Robert Dunn (footballer) (born 1979), Scottish footballer
Robert Dunn (novelist) (born 1950), American novelist
Robert Dunn (screenwriter) (born 1978), Canadian screenwriter
Robert Dunn (surgeon) (1799–1877), British physician
Bob Dunn (cartoonist) (1908–1989), American cartoonist
Bob Dunn (politician) (1946–2003), British Conservative Party MP for Dartford, 1979–1997
Bob Dunn (musician) (1908–1971), pioneer Western swing musician
Bobby Dunn (1890–1937), comic actor
Robbie Dunn (born 1960), Australian former soccer player
Robbie Dunn (musician) (born 1951), Irish folk singer-songwriter
Robert 'Dolly' Dunn (1941–2009), Australian former school-teacher, convicted of child molestation in 2001
Robert C. Dunn (1855-1918), American politician
Robert G. Dunn (born 1923), American politician
Robert Ellis Dunn (1928–1996), American postmodern dance pioneer
Robert W. Dunn (1895–1977), American political activist and economic researcher
Robert M. Dunn (1988-) United States Marine. Silver Star, Bronze Star with Valor. Served Operation Enduring Freedom, 4 tours. 2008-2013.