| Name | Clay County |
| State | Illinois |
| FIPS Code | 17025 |
| County Seat | Louisville |
| Timezone | Central Daylight Time (CDT) |
| Population (2024) | 12,945 |
| Population Growth Rate(2020-2024) | -2.66% |
| Majority Ethnicity | White 98.06% |
| Public School Majority Ethnicity | White 93% |
| Partisan Voting Index | Strongly Republican:+34 |
| Unemployment Rate (May 2026) | 5.8% |
| Sales Tax Rate (2025) | 6.75% |
| Area Code(s) | 618 / 217 |
| Race/Ethnicity | Percentage of Population (2023) |
|---|---|
| White | 98.06% |
| African American | 0.73% |
| Hispanic | 0.69% |
| Asian | 0.31% |
| Native American | 0.21% |
| Hawaiin/Pacific Islander | 0% |
| Race/Ethnicity | Percentage of Public School Students (2023) |
|---|---|
| White | 93.27% |
| African American | 0.82% |
| Hispanic | 3.16% |
| Asian | 0.6% |
| Native American | 0.23% |
| Hawaiin/Pacific Islander | 0% |