| Type: | Bishop |
| Honorific-Prefix: | Most Reverend |
| Giovanni Alfonso Petrucci | |
| Bishop of Belcastro | |
| Church: | Catholic Church |
| Diocese: | Diocese of Belcastro |
| Term: | 1686–1688 |
| Predecessor: | Benedetto Bartolo |
| Successor: | Giovanni Emblaviti |
| Ordination: | 23 December 1673 |
| Consecration: | 28 July 1686 |
| Consecrated By: | Galeazzo Marescotti |
| Birth Date: | 18 December 1650 |
| Birth Place: | Cutro, Italy |
| Death Date: | January 1688 (age 37) |
| Death Place: | Belcastro, Italy |
| Nationality: | Italian |
Giovanni Alfonso Petrucci (18 December 1650 – January 1688) was a Roman Catholic prelate who served as Bishop of Belcastro (1686–1688).[1]
Giovanni Alfonso Petrucci was born in Cutro, Italy on 18 December 1650 and ordained a priest on 23 December 1673.[2] On 15 July 1686, he was appointed during the papacy of Pope Innocent XI as Bishop of Belcastro.On 28 July 1686, he was consecrated bishop by Galeazzo Marescotti, Cardinal-Priest of Santi Quirico e Giulitta, with Pietro de Torres, Archbishop of Dubrovnik, and Marcantonio Barbarigo, Archbishop of Corfù, serving as co-consecrators. He served as Bishop of Belcastro until his death in January 1688.