Robert or Bob Barrett may refer to:
Bob Barrett (American football) (born 1935), American football player
Bob Barrett (baseball) (1899–1982), American baseball infielder
Bob Barrett (politician) (born 1967), Minnesota state representative
Rob Barrett (born 1969), American guitarist for Cannibal Corpse
Bob Barrett (actor) (born 1966), English stage and television actor
Robert Barrett (athlete) (born 1957), British Paralympian
Robert E. Barrett, former water company president and namesake of the Robert E. Barrett Fishway on the Connecticut River, United States
Robert G. Barrett (1942–2012), Australian author
Robert T. Barrett (born 1949), American illustrator
Robert South Barrett IV, American ambassador
Bob Barrett (Indigenous Australian) (c.1795–1833), Indigenous Australian convict hunter
Robert Barrett (director), co-director of Beyond the Door