Robert Nixon may refer to:

• Robert A. Nixon (1900–1948), American politician
• Robert Nixon (politician) (born 1928), retired Canadian politician
• Robert Nixon (comics) (1939–2002), British comics artist
• Robert Nixon (prophet), 15th or 17th century prophet in Cheshire, England
• Robert Samuel Nixon (1909–1998), MP in the Northern Ireland Parliament for North Down
• Robert Nixon (serial killer) (died 1939), American serial killer
• Robert Nixon (filmmaker) (born 1954), American filmmaker

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