| Place Name | Big River Township (Jefferson County) |
| Place Type | Township |
| County | Jefferson County |
| Area Code(s) | 636,573 |
| Timezone | Central Standard Time (CST) |
| Population (2021) | 6,309 |
| Majority Ethnicity | White 98.55% |
| Metro/Micro Stats Area | St. Louis, MO-IL |
| US Congressional District(s) | Missouri 8thMissouri 3rd |
| State House Districts | 111,118 |
| State Senate Districts | 3 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 98.55% |
| African American | 0% |
| Hispanic | 0.06% |
| Asian | 0.28% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 1.11% |