Conte Carlo Baldassare Perrone di San Martino, known in some English sources as Count Perron, was the Sardinian resident minister in Great Britain between 1749 and 1755. In 1777 he was appointed Regent of the Secretariat for Foreign Affairs and in 1779 he became First Secretary. Although from an old noble family, he owed his rise largely to his connexions with the Ferrero della Marmora family and with Archbishop Rorengo di Rorà of Turin, and to his marriage into the Lascaris di Ventimiglia family.