Hyacinthe Libelli, O.P. (1616 – 23 October 1684) was a Roman Catholic prelate who served as Archbishop of Avignon (1673–1684).^[1][2]

Hyacinthe Libelli was born in Citta di Castello, Italy in 1616 and ordained a priest in the Order of Preachers .^[2] From 1630 to 1634 he was a student at the College of Saint Thomas, the future Pontifical University of St. Thomas Aquinas, the Angelicum, in Rome. In 1644 he was made a Doctor of Sacred Theology at the college.^[3] On 30 January 1673, he was appointed during the papacy of Pope Clement X as Archbishop of Avignon.^[1][2] On 24 February 1673, he was consecrated bishop by Gasparo Carpegna, Cardinal-Priest of San Silvestro in Capite, with Stefano Brancaccio, Bishop of Viterbo e Tuscania, and Carlo Vaini, Titular Archbishop of Nicaea, serving as co-consecrators.^[2] He served as Archbishop of Avignon until his death on 23 October 1684.^[1][2]

While bishop, he was the principal co-consecrator of:^[2]

• Simon Gaudenti, Bishop of Ossero (1673);
• Andrea Francolisio, Bishop of Tricarico (1673); and
• Giuseppe di Giacomo, Bishop of Bovino (1673).