| Type: | Bishop |
| Honorific-Prefix: | Most Reverend |
| Antonio Grassi | |
| Bishop of Chioggia | |
| Church: | Catholic Church |
| Diocese: | Diocese of Chioggia |
| Term: | 1696–1715 |
| Predecessor: | Stefano Rosato |
| Successor: | Giovanni Soffietti |
| Ordination: | 4 June 1667 |
| Consecration: | 3 June 1696 |
| Consecrated By: | Bandino Panciatici |
| Birth Date: | 11 July 1644 |
| Birth Place: | Chioggia, Italy |
| Death Date: | 4 November 1715 (age 71) |
| Death Place: | Chioggia, Italy |
| Nationality: | Italian |
Antonio Grassi (1644–1715) was a Roman Catholic prelate who served as Bishop of Chioggia (1696–1715).[1]
Antonio Grassi was born in Chioggia, Italy on 11 July 1644. On 18 December 1666, he was ordained a deacon and on 4 June 1667, he was ordained a priest.[2] On 21 May 1696, he was appointed during the papacy of Pope Innocent XII as Bishop of Chioggia.On 3 June 1696, he was consecrated bishop by Bandino Panciatici, Cardinal-Priest of San Pancrazio, with Prospero Bottini, Titular Archbishop of Myra, and Sperello Sperelli, Bishop of Terni, serving as co-consecrators.He served as Bishop of Chioggia until his death on 4 November 1715.While bishop, he ordained Gian Alberto De' Grandi to the priesthood.