Robert Webster may refer to:

• Robert Webster (virologist) (born 1932), New Zealand avian influenza expert
• Sir Robert Webster (politician), Australian company director, grazier, parliamentarian and chancellor of University of New South Wales
• Robert M. Webster (1892–1972), United States Air Force major general
• Robert N. Webster, a pseudonym of Raymond A. Palmer
• Robert Webster, footballer, co-founder of Norwich City F.C.
• Robert Edward Webster, a US plastics technician who defected to the Soviet Union in 1959, returning in 1962
• Robert Grant Webster (Conservative MP), British Member of the UK Parliament for St Pancras East
• Bob Webster (born 1938), American, former Olympic diving champion

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