| Type: | Bishop |
| Honorific-Prefix: | Most Reverend |
| Marco Antonio Mandosio | |
| Bishop of Nicastro | |
| Church: | Catholic Church |
| Diocese: | Diocese of Nicastro |
| Term: | 1637–1638 |
| Predecessor: | Domenico Ravenna |
| Successor: | Giovanni Tommaso Perrone |
| Consecration: | 21 September 1637 |
| Consecrated By: | Alessandro Cesarini (iuniore) |
| Birth Date: | 1606 |
| Birth Place: | Rome, Italy |
| Death Date: | August 1638 (age 32) |
| Death Place: | Nicastro, Italy |
| Nationality: | Italian |
Marco Antonio Mandosio or Marco Antonio Mondosio (1606–1638) was a Roman Catholic prelate who served as Bishop of Nicastro (1637–1638).[1]
Marco Antonio Mandosio was born in Rome, Italy in 1606.[2] On 7 September 1637, he was appointed during the papacy of Pope Urban VIII as Bishop of Nicastro. On 21 September 1637, he was consecrated bishop by Alessandro Cesarini (iuniore), Cardinal-Deacon of Santa Maria in Cosmedin, with Alfonso Gonzaga, Titular Archbishop of Rhodus, and Giovanni Battista Scanaroli, Titular Bishop of Sidon, serving as co-consecrators. He served as Bishop of Nicastro until his death in August 1638.