| Place Name | Ciénaga Baja |
| Place Type | Barrio |
| ZIP Code(s) | 00729 00745 |
| County | Rio Grande |
| Area Code(s) | 787,939 |
| Timezone | Atlantic Standard Time (AST) |
| Population (2021) | 16,414 |
| Majority Ethnicity | Hispanic 0.04% |
| Metro/Micro Stats Area | San Juan-Bayamón-Caguas, PR |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 23.59% |
| African American | 9.98% |
| Hispanic | 0.04% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 66.39% |