| Place Name | Jefferson Township (Saint Louis County) |
| Place Type | Township |
| ZIP Code(s) | 63119 63122 63126 63143 |
| County | Saint Louis County |
| Area Code(s) | 314 |
| Timezone | Central Daylight Time (CDT) |
| Population (2021) | 37,825 |
| Majority Ethnicity | White 92.29% |
| Metro/Micro Stats Area | St. Louis, MO-IL |
| US Congressional District(s) | Missouri 2ndMissouri 1st |
| State House Districts | 83,90,91 |
| State Senate Districts | 1,4,15,24 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 92.29% |
| African American | 2.78% |
| Hispanic | 0.07% |
| Asian | 2.62% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 2.23% |