Pietro Accolti (15 March 1455 – 11 December 1532), known as the "cardinal of Ancona", was an Italian Roman Catholic cardinal. He was born in Florence, the son of Benedetto Accolti sr, and died at Rome (Ciaconi, Vitae Pontificum, 1677, iii. 295).
He was abbreviator under Pope Leo X, and in that capacity drew up in 1520 the bull against Martin Luther (L. Cardella, Memorie Storiche de' Cardinali, 1793, iii. 450).
He was made Bishop of Ancona in 1505, and, in 1511, cardinal-priest by Pope Julius II with the title of Sant'Eusebio. Accolti opted as cardinal-bishop in 1523 to the title of Albano, and later was Cardinal Bishop of Palestrina (1524) and lately in the same year Cardinal Bishop of Sabina-Poggio Mirteto. He also held as administrator the sees of Cadiz, Maillezais, Arras and Cremona, and was made Archbishop of Ravenna (1524) by Pope Clement VII.