| Rey Marquez | |
| Order: | 4th Commissioner of the PBA |
| Term Start: | January 10, 1992 |
| Term End: | December 23, 1993 |
| Predecessor: | Rudy Salud |
| Successor: | Jun Bernardino |
| Office1: | 1st Chairman of the PBA Board of Governors |
| Term Start1: | 1987 |
| Term End1: | 1990 |
| 1Namedata2: | Formula Shell Zoom Masters |
| Predecessor1: | Carlos Palanca III |
| Successor1: | Luis "Moro" Lorenzo Sr. |
| Birth Name: | Reynaldo Marquez |
| Birth Date: | 1932 |
| Birth Place: | Philippines |
| Death Date: | November 11, 2018 |
| Occupation: | Sports executive |
| Nationality: | Filipino |
Reynaldo Marquez was the fourth commissioner of the Philippine Basketball Association. He also served as a member of the league's board of governors, representing Formula Shell before being appointed as commissioner.
Despite only lasting two seasons, Marquez made significant changes that continues to affect the league until today. Marquez changed the schedule of the All-Filipino Conference to the beginning of the season in what is now the Philippine Cup. Marquez also started the Commissioner's Cup and the Governor's Cup.