| Pacifico A. Ortiz | |
| Order: | 25th |
| President of the Ateneo de Manila University | |
| Term Start: | 1969 |
| Term End: | 1970 |
| Predecessor: | James F. Donelan |
| Successor: | Francisco Araneta |
| Birth Date: | September 25, 1913 |
| Birth Place: | Cantilan, Surigao, Philippine Islands |
| Death Place: | Manila, Philippines |
| Nationality: | Filipino |
| Profession: | Professor Jesuit priest |
Pacifico Arreza Ortiz (September 25, 1913 – December 9, 1983)[1] was a Filipino Jesuit priest and academic. He is best known as a spiritual adviser of Manuel L. Quezon, for being the first Filipino president of the Ateneo de Manila University,[2] [3] and as a staunch critic of the Martial Law dictatorship of former Philippine President Ferdinand Marcos,[4] especially while he served as the delegate for the province of Rizal to the 1971 Philippine Constitutional Convention.[1]