Pietro Vidoni (8 November 1610 – 5 January 1681) was an Italian cardinal and between 1652–1660 a papal legate and nuncio to Poland.
Vidoni was born 8 November 1610 in Cremona into Italian noble family. He studied at several Italian universities and received his doctorate, before moving to Rome and pursuing an ecclesiastical career.
During the pontificate of Pope Urban VIII, Vidoni was appointed as the governor of Rimini, Tivoli, Sabina, Orvieto and Spoleto
In 1652, Vidoni was appointed Apostolic Nuncio to Poland, a position he held until his elevation to Cardinal in 1660.
He conducted the holy mass in the Latin Cathedral of Lwów, during which Polish King John II Casimir had taken the Lwów Oath.
Returning to Italy, he was elevated to cardinal by pope Alexander VII, in the consistory of 5 April 1660. In 1661 he was given the titular church of San Callisto. In 1662 he was a legate in Bologna.