| Place Name | St. Johns Township |
| Place Type | Township |
| ZIP Code(s) | 63055 63068 63089 63090 63332 |
| County | Franklin County |
| Area Code(s) | 636 |
| Timezone | Central Standard Time (CST) |
| Population (2021) | 5,298 |
| Majority Ethnicity | White 96.66% |
| Metro/Micro Stats Area | St. Louis, MO-IL |
| US Congressional District(s) | Missouri 3rd |
| State House Districts | 61,109 |
| State Senate Districts | 26 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 96.66% |
| African American | 1.02% |
| Hispanic | 0% |
| Asian | 0.63% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 1.69% |