| Place Name | Topanga |
| Place Type | Census Designated Place |
| ZIP Code(s) | 90290 |
| County | Los Angeles County |
| Area Code(s) | 310,424 |
| Timezone | Pacific Daylight Time (PDT) |
| Population (2022) | 9,055 |
| Population Growth Rate (2010-19) | 3.27% |
| Majority Ethnicity | White 74.07% |
| Metro/Micro Stats Area | Los Angeles-Long Beach-Anaheim, CA |
| US Congressional District(s) | California 33rd |
| State Assembly Districts | 50 |
| State Senate Districts | 27 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 74.07% |
| African American | 1.65% |
| Hispanic | 0% |
| Asian | 11.3% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 12.98% |