| Place Name | Eureka |
| Place Type | City |
| ZIP Code(s) | 61530 |
| County | Woodford County |
| Area Code(s) | 309 |
| Timezone | Central Daylight Time (CDT) |
| Population (2022) | 5,421 |
| Population Growth Rate (2010-19) | -1.28% |
| Majority Ethnicity | White 93.13% |
| Metro/Micro Stats Area | Peoria, IL |
| US Congressional District(s) | Illinois 18th |
| State House Districts | 106 |
| State Senate Districts | 53 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 93.13% |
| African American | 1.48% |
| Hispanic | 0% |
| Asian | 0.27% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 5.12% |