Prospero Marefoschi (24 September 1653 – 24 February 1732) was a cardinal of the Roman Catholic Church.
|Installed||29 January 1725|
|Born||24 September 1653|
|Died||24 February 1732|
He was born in Montesanto, now part of Potenza Picena, in the region of Marche, Italy. He was ordained as a deacon in 1709 and archbishop in 1711. He was made a cardinal by Pope Benedict XIII on 29 December 1724. He participated in the papal conclave of 1730.
Cardinal Mario Marefoschi was his nephew.