| Place Name | Greendale |
| Place Type | City |
| ZIP Code(s) | 63121 |
| County | Saint Louis County |
| Area Code(s) | 314 |
| Timezone | Central Standard Time (CST) |
| Population (2022) | 673 |
| Population Growth Rate (2010-19) | -1.38% |
| Majority Ethnicity | African American 79.35% |
| Metro/Micro Stats Area | St. Louis, MO-IL |
| US Congressional District(s) | Missouri 1st |
| State House Districts | 85 |
| State Senate Districts | 14 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 15.61% |
| African American | 79.35% |
| Hispanic | 0.36% |
| Asian | 1.56% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 3.12% |