Tiago or Thiago Santos may refer to:

• Thiago Santos (middleweight fighter) (born 1984), Brazilian mixed martial artist
• Thiago Santos (heavyweight fighter) (born 1986), Brazilian mixed martial artist
• Tiago Alencar (Tiago Alencar dos Santos, born 1986), Brazilian footballer
• Thiago Campos Santos (born 1984), Brazilian footballer
• Tiago Cardoso (Tiago Cardoso dos Santos, born 1984), Brazilian footballer
• Thiago Fernandes dos Santos (born 1988), Brazilian footballer
• Thiago de Jesus Santos (born 1988), Brazilian footballer
• Schumacher (footballer) (Thiago Maier dos Santos, born 1986), Brazilian footballer
• Thiago Ribeiro dos Santos (born 1989), Brazilian footballer
• Tiago Silva dos Santos, Brazilian footballer
• Tiago Pires (footballer) (Tiago Filipe dos Santos Pires, born 1987), Portuguese footballer
• Tiago dos Santos Roberto (born 1984), Brazilian footballer
• Thiago dos Santos (footballer, born 1989), Brazilian footballer for Palmeiras
• Thiago Leal Santos, Brazilian football goalkeeper for Machine Sazi

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