Pietro Marcellino Corradini (2 June 1658 - 8 February 1743) was an Italian Roman Catholic cardinal.
Corradini served in various departments of the Roman Curia under several popes and founded the Collegine Sisters of the Holy Family as a response to the demand for religious instruction for girls.
In 1993 his cause for sainthood was opened in Palermo and is still ongoing; he now has the posthumous title Servant of God.