Grant Smith may refer to:

• Grant Smith (footballer, born 1980), Scottish footballer
• Grant Smith (footballer, born 1993), English footballer
• Ellis Grant Smith, Canadian musician of the R&B band Grant Smith & The Power
• R. Grant Smith (born 1939), American diplomat
• Grant Smith (field hockey) (born 1971), Australian field hockey player
• Grant Maloy Smith (born 1957), American singer, songwriter, musician, and businessman
• Grant Smith (politician), mayor of Palmerston North, New Zealand