| Type: | Prelate Nullius |
| Honorific Prefix: | The Most Reverend |
| Camilo D. Gregorio | |
| Bishop-Prelate of Batanes | |
| Church: | Catholic Church |
| See: | Territorial Prelature of Batanes |
| Enthroned: | 13 September 2003 |
| Ended: | 20 May 2017 |
| Predecessor: | Jose P. Salazar |
| Successor: | Danilo Bangayan Ulep |
| Previous Post: | Auxiliary Bishop of Cebu (1987–1989) Bishop of Bacolod (1989–2000) |
| Ordination: | 1 December 1963 |
| Ordained By: | Luigi Traglia |
| Consecration: | 29 March 1987 |
| Consecrated By: | Jose Tomas Sanchez |
| Birth Date: | 25 September 1939 |
| Birth Place: | Cuyapo, Nueva Ecija, Philippines |
| Occupation: | Prelate (bishop) |
| Residence: | Palacio Nu Obispo Basco, Batanes 3009 |
| Alma Mater: | University of Santo Tomas |
| Coat Of Arms: | File:Coat of arms of Camilo Diaz Gregorio as Prelate of Batanes.svg |
| Motto: | Latin: Servire in Caritate ('Serving in Love') |
Camilo Diaz Gregorio (25 September 1939 - 21 May 2018) was a Roman Catholic bishop.
Diaz Gregorio was born in the Philippines and was ordained to the priesthood in 1963. He served as auxiliary bishop of Girus and as auxiliary bishop of the Roman Catholic Archdiocese of Cebu, Philippines from 1987 to 1989. Diaz Gregorio then served as bishop of the Roman Catholic Diocese of Bacolod from 1989 to 2000 and then served as bishop of the Roman Catholic Territorial Prelature of Batanes from 2003 to 2017.[1]