| Place Name | Centralia |
| Place Type | City |
| ZIP Code(s) | 62801 |
| County | Marion County Clinton County |
| Area Code(s) | 618 |
| Timezone | Central Daylight Time (CDT) |
| Population (2022) | 13,019 |
| Population Growth Rate (2010-19) | -6.52% |
| Majority Ethnicity | White 85.24% |
| Metro/Micro Stats Area | Centralia, ILSt. Louis, MO-ILMount Vernon, IL |
| US Congressional District(s) | Illinois 15th |
| State House Districts | 107,108 |
| State Senate Districts | 54 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 85.24% |
| African American | 8.84% |
| Hispanic | 0.01% |
| Asian | 1.44% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 4.47% |