| Place Name | Onarga |
| Place Type | Village |
| ZIP Code(s) | 60955 |
| County | Iroquois County |
| Area Code(s) | 815,779 |
| Timezone | Central Daylight Time (CDT) |
| Population (2022) | 1,378 |
| Population Growth Rate (2010-19) | -2.56% |
| Majority Ethnicity | Hispanic 0.76% |
| US Congressional District(s) | Illinois 16th |
| State House Districts | 106 |
| State Senate Districts | 53 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 48.62% |
| African American | 0.97% |
| Hispanic | 0.76% |
| Asian | 0.07% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 49.59% |