| Place Name | Sierra Alta |
| Place Type | Barrio |
| ZIP Code(s) | 00698 |
| County | Yauco |
| Area Code(s) | 787,939 |
| Timezone | Atlantic Standard Time (AST) |
| Population (2021) | 1,164 |
| Majority Ethnicity | Hispanic 0% |
| Metro/Micro Stats Area | Yauco, PR |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 40.37% |
| African American | 2.12% |
| Hispanic | 0% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 57.51% |