| Place Name | Spencer Township (Pike County) |
| Place Type | Township |
| ZIP Code(s) | 63334 63339 63382 63441 |
| County | Pike County |
| Area Code(s) | 573 |
| Timezone | Central Standard Time (CST) |
| Population (2021) | 792 |
| Majority Ethnicity | White 98.73% |
| US Congressional District(s) | Missouri 6th |
| State House Districts | 40 |
| State Senate Districts | 18 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 98.73% |
| African American | 0.38% |
| Hispanic | 0.51% |
| Asian | 0.13% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 0.25% |