| Place Name | Illiopolis Township |
| Place Type | Township |
| ZIP Code(s) | 62515 62539 62547 |
| County | Sangamon County |
| Area Code(s) | 217 |
| Timezone | Central Daylight Time (CDT) |
| Population (2021) | 1,354 |
| Majority Ethnicity | White 99.1% |
| Metro/Micro Stats Area | Springfield, IL |
| US Congressional District(s) | Illinois 18th |
| State House Districts | 87 |
| State Senate Districts | 44 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 99.1% |
| African American | 0.3% |
| Hispanic | 0% |
| Asian | 0.07% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 0.52% |