| Type: | Bishop |
| Honorific-Prefix: | Most Reverend |
| Antonio Forteguerra | |
| Bishop of Pienza | |
| Church: | Catholic Church |
| Diocese: | Diocese of Pienza |
| Term: | 1698–1714 |
| Predecessor: | Girolamo Borghese |
| Successor: | Ascanio Silvestri |
| Consecration: | 21 Sep 1698 |
| Consecrated By: | Pier Matteo Petrucci |
| Birth Date: | 13 Jun 1648 |
| Birth Place: | Siena, Italy |
| Death Date: | Jan 1714 |
Antonio Forteguerra, O.S.B. (1648–1714) was a Roman Catholic prelate who served as Bishop of Pienza (1698–1714).
Antonio Forteguerra was born on 13 Jun 1648 in Siena, Italy and ordained a priest in the Order of Saint Benedict.On 15 Sep 1698, he was appointed during the papacy of Pope Innocent XII as Bishop of Pienza.On 21 Sep 1698, he was consecrated bishop by Pier Matteo Petrucci, Cardinal-Priest of San Marcello al Corso, with Francesco Pannocchieschi d'Elci, Archbishop of Pisa, and Domenico Belisario de Bellis, Bishop of Molfetta, serving as co-consecrators. He served as Bishop of Pienza until his death in Jan 1714.