Giacomo Filippo Fransoni (10 December 1775 – 20 April 1856) was an Italian prelate and cardinal who served from 1834 to 1856 as prefect of the Sacred Congregation for the Propagation of the Faith.

He was the cardinal priest of the Church of San Lorenzo in Lucina at the time of his death.

[1] Born in Genoa, Fransoni was ordained a priest on 14 March 1807, at 31 years of age, by Cardinal Pietro Francesco Galeffi.

On 2 October 1826, aged 50, he was elevated to the cardinalate and named cardinal priest of the Basilica of Santa Maria in Aracoeli.

On 21 November 1834, Fransoni was appointed prefect of the Sacred Congregation for the Propagation of the Faith in the Curia.