| Name | Fayette County |
| State | Illinois |
| FIPS Code | 17051 |
| County Seat | Vandalia |
| Timezone | Central Daylight Time (CDT) |
| Population (2024) | 21,209 |
| Population Growth Rate(2020-2024) | -1.32% |
| Majority Ethnicity | White 92.24% |
| Public School Majority Ethnicity | White 95% |
| Partisan Voting Index | Strongly Republican:+33 |
| Unemployment Rate (May 2026) | 6.6% |
| Sales Tax Rate (2025) | 7.25% |
| Area Code(s) | 618 / 217 |
| Race/Ethnicity | Percentage of Population (2023) |
|---|---|
| White | 92.24% |
| African American | 3.89% |
| Hispanic | 2.99% |
| Asian | 0.15% |
| Native American | 0.52% |
| Hawaiin/Pacific Islander | 0.2% |
| Race/Ethnicity | Percentage of Public School Students (2023) |
|---|---|
| White | 94.65% |
| African American | 0.44% |
| Hispanic | 1.46% |
| Asian | 0.26% |
| Native American | 0.03% |
| Hawaiin/Pacific Islander | 0.06% |