| Type: | Cardinal |
| Honorific-Prefix: | His Eminence |
| Giovanni Battista Deti | |
| Cardinal-Bishop of Ostia e Velletri Bishop of Reggio Emilia | |
| Church: | Catholic Church |
| Consecration: | 24 Jun 1623 |
| Consecrated By: | Ottavio Bandini |
| Birth Date: | 16 Feb 1580 |
| Birth Place: | Ferrara, Italy |
| Death Date: | 13 Jul 1630 (age 50) |
| Death Place: | Rome, Italy |
| Coat Of Arms: | Giovanni Battista Deti stemma.svg |
Giovanni Battista Deti (1580–1630) was a Roman Catholic cardinal.[1]
On 24 Jun 1623, he was consecrated bishop by Ottavio Bandini, Cardinal-Bishop of Palestrina, with Alfonso Gonzaga, Titular Archbishop of Rhodus, and Federico Baldissera Bartolomeo Cornaro, Bishop of Bergamo, serving as co-consecrators.[2]