Robert Kirby (1948–2009) was a British musician and arranger.

Robert Kirby may also refer to:

• Robert J. Kirby (1889–1944), prison warden
• Robert Kirby (satirist) (1936–2007), South African satirist
• Robert Kirby (humor columnist) (born 1953), syndicated humor columnist for the Salt Lake Tribune
• Robert Kirby (cartoonist) (born 1962), American comics artist

• Robion Kirby (born 1938), American mathematician

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