Sergio Martínez

• Sergio Martínez (boxer), Argentine boxer
• Sergio Martínez (cyclist), Cuban Olympic cyclist
• Sergio Martínez (swimmer), Colombian Olympic swimmer
• Sergio Martínez (footballer, born 1969), Uruguayan footballer
• Sergio Martínez (footballer, born 2007), Spanish footballer
• Sergio Martínez Ballesteros, Spanish footballer
• Sergio Castro Martínez, Mexican humanitarian