Sir John Maria Emilio Gatti (13 August 1872 – 14 September 1929) was an Anglo-Swiss theatre manager, restaurateur and businessman who was also a prominent Conservative politician in London local government. Gatti was educated at Stonyhurst College and St John's College, Oxford, before being called to the bar at the Inner Temple. He married Lily Mary Lloyd in 1897 and they had seven children. In the same year his father died, and he took over the family businesses along with his younger brother Rocco Joseph Stefano Gatti.