| Type: | Cardinal |
| Honorific-Prefix: | His Eminence |
| Marcantonio Colonna | |
| Vicar General of Rome | |
| Church: | Roman Catholic Church |
| Diocese: | Rome |
| See: | Rome |
| Appointed: | 19 April 1762 |
| Term End: | 4 December 1793 |
| Predecessor: | Antonio Maria Erba-Odescalchi |
| Successor: | Andrea Corsini |
| Other Post: | Congregation for the Residence of Bishops (1762-93) Archpriest of Santa Maria Maggiore (1763-93) Cardinal-Bishop of Palestrina (1784-93) |
| Ordination: | 1 February 1761 |
| Consecration: | 25 April 1762 |
| Consecrated By: | Pope Clement XIII |
| Cardinal: | 19 November 1759 |
| Created Cardinal By: | Pope Clement XIII |
| Rank: | Cardinal-Deacon (1759-62) Cardinal-Priest (1762-84) Cardinal-Bishop (1784-93) |
| Birth Name: | Marcantonio Colonna |
| Birth Date: | 16 August 1724 |
| Birth Place: | Rome, Papal States |
| Death Place: | Rome, Papal States |
| Buried: | Santi Apostoli |
| Parents: | Fabrizio Colonna Caterina Zefirina Salviati |
| Previous Post: | Prefect of the Apostolic Palace (1743-59) Cardinal-Deacon of Santa Maria in Aquiro (1759-62) Titular Archbishop of Corinthus (1762) Cardinal-Priest of Santa Maria della Pace (1762-84) Camerlengo of the College of Cardinals (1770-71) Cardinal-Priest of San Lorenzo in Lucina (1784) Cardinal Protopriest (1784) |
| Coat Of Arms: | Stemma cardinalizio dei Colonna.png |
Marcantonio Colonna (16 August 1724 – 4 December 1793) was an Italian Catholic cardinal. Born in Rome on 16 August 1724, Colonna was made Cardinal-Deacon of Santa Maria in Aquiro by Pope Clement XIII on 19 November 1759. He was then ordained a deacon on 9 March 1760 and a priest on 1 February 1761. He was appointed Titular Archbishop of Corinthus and Cardinal-Priest of Santa Maria della Pace by Pope Clement XIII on 19 April 1762. Soon thereafter, on 25 April, Colonna was ordained a bishop. Pope Clement XIII acted as his consecrator while Cardinal Gian Francesco Albani (grand-nephew of Pope Clement XI) and Cardinal Henry Benedict Stuart acted as co-consecrators.
In 1763, he was appointed Prefect of the Congregation for Residence of Bishops and in January of that year, he was appointed Archpriest of the Basilica di Santa Maria Maggiore. On 25 June 1784, Colonna was made Cardinal-Priest of San Lorenzo in Lucina by Pope Clement XIV and on 20 September 1784, he was appointed Cardinal-Bishop of Palestrina. Colonna died on 4 December 1793.[1]