| Type: | Bishop |
| Honorific-Prefix: | Most Reverend |
| Diego de Simancas | |
| Bishop of Zamora | |
| Church: | Catholic Church |
| Diocese: | Diocese of Zamora |
| Term: | 1578–1583 |
| Predecessor: | Rodrigo de Castro Osorio |
| Successor: | Juan Ruiz Agüero |
| Consecration: | 1 April 1565 |
| Birth Place: | Spain |
| Death Date: | 16 October 1583 |
| Death Place: | Zamora, Spain |
| Previous Post: | Bishop of Ciudad Rodrigo (1564–1568) Bishop of Badajoz (1568–1578) |
Diego de Simancas or Diego de Simancas Simancas (died 1583) was a Roman Catholic prelate who served as Bishop of Zamora (1578–1583), Bishop of Badajoz (1568–1578), and Bishop of Ciudad Rodrigo (1564–1568).[1] [2] [3]
Diego de Simancas was born in Spain, the son of Diego de Simancas Bretón and María de Simancas and the brother of Juan de Simancas Simancas, Bishop of Cartagena.[4] On 15 December 1564, he was appointed during the papacy of Pope Pius IV as Bishop of Ciudad Rodrigo.On 1 April 1565, he was consecrated bishop.On 3 December 1568, he was appointed during the papacy of Pope Pius V as Bishop of Badajoz.On 13 June 1578, he was appointed during the papacy of Pope Gregory XIII as Bishop of Zamora.He served as Bishop of Zamora until his death on 16 October 1583.
While bishop, he was the principal co-consecrator of: