| Place Name | South Monrovia Island |
| Place Type | Census Designated Place |
| ZIP Code(s) | 91010 91016 |
| County | Los Angeles County |
| Area Code(s) | 626 |
| Timezone | Pacific Standard Time (PST) |
| Population (2022) | 6,140 |
| Population Growth Rate (2010-19) | -3.87% |
| Majority Ethnicity | Hispanic 0.83% |
| Metro/Micro Stats Area | Los Angeles-Long Beach-Anaheim, CA |
| US Congressional District(s) | California 32nd |
| State Assembly Districts | 48 |
| State Senate Districts | 22 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 21.78% |
| African American | 5.71% |
| Hispanic | 0.83% |
| Asian | 7.52% |
| Native American | 0.07% |
| Hawaiin/Pacific Islander | 64.09% |