| Race/Ethnicity | Number | Percent |
|---|---|---|
| Hispanic | 1,303 | 56.12% |
| Unknown | 920 | 39.62% |
| White | 62 | 2.67% |
| Black or African American | 28 | 1.21% |
| American Indian or Alaska Native | 4 | 0.17% |
| Asian | 4 | 0.17% |
| Multi-Ethnic | 1 | 0.04% |
| Native Hawaiian or Pacific Islander | 0 | 0.04% |
| International | 0 | 0.04% |
The majority of UPR Rio Piedras graduate students are Hispanic.