| Place Name | Olney Township |
| Place Type | Township |
| ZIP Code(s) | 62450 |
| County | Richland County |
| Area Code(s) | 618 |
| Timezone | Central Daylight Time (CDT) |
| Population (2021) | 10,037 |
| Majority Ethnicity | White 95.33% |
| US Congressional District(s) | Illinois 15th |
| State House Districts | 109 |
| State Senate Districts | 55 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 95.33% |
| African American | 0.89% |
| Hispanic | 0.1% |
| Asian | 0.98% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 2.7% |