| Place Name | Jarvis Township |
| Place Type | Township |
| County | Madison County |
| Area Code(s) | 618 |
| Timezone | Central Daylight Time (CDT) |
| Population (2021) | 15,790 |
| Majority Ethnicity | White 94.56% |
| Metro/Micro Stats Area | St. Louis, MO-IL |
| US Congressional District(s) | Illinois 15th |
| State House Districts | 108 |
| State Senate Districts | 54 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 94.56% |
| African American | 1.57% |
| Hispanic | 0.02% |
| Asian | 0.93% |
| Native American | 0.12% |
| Hawaiin/Pacific Islander | 2.79% |