| Place Name | Smithton Township |
| Place Type | Township |
| County | Saint Clair County |
| Area Code(s) | 618 |
| Timezone | Central Standard Time (CST) |
| Population (2021) | 4,183 |
| Majority Ethnicity | White 96.74% |
| Metro/Micro Stats Area | St. Louis, MO-IL |
| US Congressional District(s) | Illinois 12th |
| State House Districts | 114 |
| State Senate Districts | 57 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 96.74% |
| African American | 1.17% |
| Hispanic | 0% |
| Asian | 0.24% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 1.85% |