| Race/Ethnicity | Number | Percent |
|---|---|---|
| Hispanic | 66 | 98.51% |
| International | 1 | 1.49% |
| Asian | 0 | 1.49% |
| Black or African American | 0 | 1.49% |
| White | 0 | 1.49% |
| Native Hawaiian or Pacific Islander | 0 | 1.49% |
| American Indian or Alaska Native | 0 | 1.49% |
| Multi-Ethnic | 0 | 1.49% |
| Unknown | 0 | 1.49% |
The majority of Pontifical Catholic University of Puerto Rico - Mayaguez graduate students are Hispanic.