Jean Porporato, originally named Giovanni Giacomo Bernardo Porporato (3 November 1879 – ?), was an Italian-born French automobile racing driver and mechanic from Turin who later lived much of his life Lyon, Rhône.
He is mentioned in automobile press articles from 28 January 1906, where he is listed as a mechanic of the racing driver Paul Bablot on the occasion of the endurance record in a Berliet 16 to 22 horsepower (12 to 16 kW) car on the route from Salon to Arles.
Paul Bablot (1873–1932), the Berliet agent at Marseille, was the named driver for the Berliet marque in competition from 1904 (Mont Ventoux race, France) until 1906 with the Targa Florio and the Tourist Trophy, and one more time in 1908 with a victory in the Boulevard Michelet Hillclimb of Marseille.
Porporato, as fine-tuner and driver, drove Berliet cars in competition from 1907 until 1911. In the 1907 season he raced in the Targa Florio race, from which he retired. In the 1908 season he reached fourth place in the Targa Florio and competed in the Targa Bologna, achieving his only victory in the Berliet. In 1911 he appeared in the Coup de Voiturettes. In this race he came fifth in the 1913 season and ninth in the 1914 season.