| Place Name | Demajagua |
| Place Type | Barrio |
| ZIP Code(s) | 00735 00738 |
| County | Fajardo |
| Area Code(s) | 787,939 |
| Timezone | Atlantic Standard Time (AST) |
| Population (2021) | 1,484 |
| Majority Ethnicity | Hispanic 0% |
| Metro/Micro Stats Area | San Juan-Bayamón-Caguas, PR |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 28.23% |
| African American | 3.62% |
| Hispanic | 0% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 68.15% |