Robert, Bob, or Bobby Clark may refer to:
- Robert Clark (actor) (born 1987), American-born Canadian television actor
- Bob Clark (1939–2007), Canadian filmmaker
- Bob Clark (television reporter) (1922–2015), American television reporter for the ABC network
- Bobby Clark (juvenile actor) (1944–2021), American film and television actor
- Bobby Clark (comedy actor) (1888–1960), vaudevillian, performed on stage, films, television, & the circus
- Robert Clark (film executive) (1905–1984), Scottish film executive
- Robert Clark (physicist), Australian chief defence scientist and academic; involved in development of Kane quantum computer
- Robert Clark (zoologist) (1882–1950), zoologist, biologist and crew member of Shackleton's Imperial Trans-Antarctic Expedition
- Robert Clark (businessman) (1924–2013), British naval officer and businessman
- Robert Clark (exonerated convict), exonerated with help of the Georgia Innocence Project after 24 years in prison
- Robert Clark (missionary) (1825–1900), British Church Missionary Society missionary
- Robert Clark (naval architect), British yacht designer, designed British Steel
- Robert Clark, American photojournalist; see Mem Nahadr
- Bobby Clark (tenor) (?–2014), original member of the Southern Gospel Cathedral Quartet
- Robert G. Clark (born 1959), American businessman
- Robert Peter Clark, a pseudonym of murderer John List
- Robert Sterling Clark (1877–1956), American art collector, horse breeder and philanthropist
- Robert T. Clark, retired U.S. Army general, commanded U.S. Fifth Army 2003–2006
- Robert Indiana (1928–2018), American artist born Robert Clark
- Robert Clark (priest) (1907–1998), dean of Edinburgh
- Robert Clark (archivist), American archivist
- Robert F. Clark (1838–1912), American banker, political figure, and sportsman
- Robert Lindsey Clark (1864–1925), English sculptor