| Place Name | Vandalia |
| Place Type | City |
| ZIP Code(s) | 63382 |
| County | Audrain County |
| Area Code(s) | 573 |
| Timezone | Central Daylight Time (CDT) |
| Population (2022) | 3,932 |
| Population Growth Rate (2010-19) | -8.87% |
| Majority Ethnicity | White 82.82% |
| Metro/Micro Stats Area | Mexico, MO |
| US Congressional District(s) | Missouri 6th |
| State House Districts | 43 |
| State Senate Districts | 10 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 82.82% |
| African American | 12.44% |
| Hispanic | 1.3% |
| Asian | 0.84% |
| Native American | 0.29% |
| Hawaiin/Pacific Islander | 2.31% |