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.

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

On 7 September 1822, he was appointed Titular Archbishop of Nazianzus and ordained to the episcopate three months later.

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.