Robert, Robbie, Bob or Bobby Gray may refer to:
- Robert Gray (footballer, born 1927) (1927–2018), Scottish footballer
- Robert Gray (footballer, born 1951), Scottish footballer
- Robert Gray (footballer, born 1953), Scottish footballer
- Robert Gray (footballer, born 1970), English footballer
- Bob Gray (footballer, born 1872) (1872–1926), Scottish football player (Grimsby Town)
- Bob Gray (footballer, born 1923) (1923–2022), English football goalkeeper
- Bob Gray (soccer) (born 1952), former head men's soccer coach at Marshall University
- Robert Gray (accountancy academic) (1948–2020), British social and environmental accounting theorist
- Robert Gray (actor) (1945–2013), actor in Armed and Dangerous
- Robert Gray (bishop of Bristol) (1762–1834), father of the bishop of Cape Town
- Robert Gray (bishop of Cape Town) (1809–1872), first Anglican bishop of Cape Town
- Robert Gray (ornithologist) (1825–1887), Scottish ornithologist
- Robert Gray (poet) (born 1945), Australian poet
- Robert Gray (sea captain) (1755–1806), American merchant sea-captain and explorer
- Robert A. Gray (1834–1906), Union Army soldier and Medal of Honor recipient
- Robert H. Gray (1948–2021), American data analyst, author, and astronomer
- Robert Hampton Gray (1917–1945), Canadian naval officer, pilot, and recipient of the Victoria Cross
- Robert Keith Gray (1921–2014), Republican activist and public relations executive
- Robert M. Gray (born 1943), American information theorist
- R. W. Gray, Canadian writer and film studies academic
- Robert Whytlaw-Gray (1877–1958), English chemist
- Bob Gray (priest) (born 1970), Irish Anglican priest
- Rob Gray (art director) (1962–2016), Canadian production designer
- Bob Gray, a name espoused by "Pennywise the Dancing Clown" from Stephen King's It