| Ruy Lourenco | |
| Office: | Dean of the New Jersey Medical School |
| Term Start: | 1989 |
| Term End: | 1999 |
| Predecessor: | Vincent Lanzoni |
| Successor: | Russell T. Joffe |
| Birth Name: | Ruy Valentim Lourenco |
| Birth Date: | 25 March 1928 |
| Birth Place: | Lisbon, Portugal |
| Death Date: | August 15, 2021 (aged 93) |
| Death Place: | Brazil |
| Spouse: | Tatiana Tscherbakowski Mourao Lourenço |
| Children: | Peter Edward Margaret Philippa |
| Alma Mater: | University of Lisbon (MD) |
| Profession: | Physician Academic administrator University professor |
Ruy Valentim Lourenco (March 25, 1928 – August 15, 2021) was an American physician, academic administrator, researcher and professor who was Dean of the New Jersey Medical School from 1989 to 1999. He led medicine at the University of Illinois College of Medicine from 1977 to 1989. The Ruy V. Lourenco Center for the Study of Emerging and Re-emerging Pathogens is named in his honor.