Ian Cook may refer to:

• Ian Cook (artist) (born 1983), English artist
• Ian Cook (footballer) (1924–1989), Scottish footballer
• Ian Cook (geographer), professor of geography at the University of Exeter
• Ian Cook (psychiatrist) (born 1960), physician-researcher at UCLA
• Ian M. Cook, British businessman
• Ian Arthur Naunton Cook (1934–1994), British police officer in the South Pacific
• Ian Cook (racing driver) in 1967 Tasman Series

• Iain Cook (born 1974), guitarist
• Ian Cooke (disambiguation)