| Type: | Bishop |
| Honorific-Prefix: | Most Reverend |
| Juan Montalvo | |
| Bishop of Cartagena | |
| Church: | Catholic Church |
| Diocese: | Diocese of Cartagena |
| Term: | 1578–1586 |
| Predecessor: | Dionisio de Santos |
| Successor: | Antonio de Hervias |
| Consecration: | 1579 |
| Death Date: | 10 Sep 1586 |
| Death Place: | Cartagena, Colombia |
Juan Montalvo, O.P. or Juan de Montalvo (died 1586) was a Roman Catholic prelate who served as Bishop of Cartagena (1578–1586).[1]
Juan Montalvo was born in Arévalo, Spain and ordained a priest in the Order of Preachers.[2] On 6 Oct 1578, he was appointed during the papacy of Pope Gregory XIII as Bishop of Cartagena.In 1579, he was consecrated bishop.He served as Bishop of Cartagena until his death on 10 Sep 1586.