Ian Gillan may refer to:

• Ian Gillan (born 1945), musician most famously with Deep Purple
• Ian Gillan Band, band fronted by Ian Gillan
• Ian Gillan (football coach), Scottish-born Australian soccer coach
• Gillan (band), band fronted by Ian Gillan
• Ian Gillan, Tony Iommi & Friends, also known as WhoCares, a musical project co-founded by Ian Gillan and Tony Iommi
  • WhoCares, a 2012 album by WhoCares

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