| Place Name | St. Just |
| Place Type | Barrio |
| ZIP Code(s) | 00976 00987 |
| County | Trujillo Alta |
| Area Code(s) | 787,939 |
| Timezone | Atlantic Standard Time (AST) |
| Population (2021) | 13,657 |
| Majority Ethnicity | Hispanic 0.07% |
| Metro/Micro Stats Area | San Juan-Bayamón-Caguas, PR |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 34.21% |
| African American | 9.91% |
| Hispanic | 0.07% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 55.81% |