| Place Name | Placentia |
| Place Type | City |
| ZIP Code(s) | 92870 |
| County | Orange County |
| Area Code(s) | 657,714 |
| Timezone | Pacific Standard Time (PST) |
| Population (2022) | 50,616 |
| Population Growth Rate (2010-19) | 2.55% |
| Majority Ethnicity | White 50.16% |
| Metro/Micro Stats Area | Los Angeles-Long Beach-Anaheim, CA |
| US Congressional District(s) | California 39th |
| State Assembly Districts | 55 |
| State Senate Districts | 29 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 50.16% |
| African American | 2.19% |
| Hispanic | 0.85% |
| Asian | 13.91% |
| Native American | 0.21% |
| Hawaiin/Pacific Islander | 32.68% |