| Type: | Bishop |
| Honorific-Prefix: | Most Reverend |
| Church: | Catholic Church |
| Diocese: | Diocese of Rieti |
| Term: | 1603–1604 |
| Predecessor: | Giulio Cesare Segni |
| Successor: | Gaspare Pasquali |
| Consecration: | 6 July 1603 |
| Consecrated By: | Girolamo Bernerio |
| Birth Date: | 1568 |
| Birth Place: | Nursia, Italy |
| Death Date: | 1604 (age 36) |
| Death Place: | Rieti, Italy |
Giovanni Desideri or Giovanni Conte (died 1604) was a Roman Catholic prelate who served as Bishop of Rieti (1603–1604).
Giovanni Desideri was born in 1568 and ordained a priest on 15 March 1603.[1] On 16 Jun 1603, he was appointed during the papacy of Pope Clement VIII as Bishop of Rieti. On 6 July 1603, he was consecrated bishop by Girolamo Bernerio, Cardinal-Bishop of Albano, with Claudio Rangoni, Bishop of Piacenza, and Andrea Sorbolonghi, Bishop of Gubbio, serving as co-consecrators. He served as Bishop of Rieti until his death in 1604.