| Name | Washington County |
| State | Illinois |
| FIPS Code | 17189 |
| County Seat | Nashville |
| Timezone | Central Daylight Time (CDT) |
| Population (2024) | 13,570 |
| Population Growth Rate(2020-2024) | -1.45% |
| Majority Ethnicity | White 97.26% |
| Public School Majority Ethnicity | White 93% |
| Partisan Voting Index | Strongly Republican:+29 |
| Unemployment Rate (May 2026) | 4.2% |
| Sales Tax Rate (2025) | 6.25% |
| Area Code(s) | 618 |
| Race/Ethnicity | Percentage of Population (2023) |
|---|---|
| White | 97.26% |
| African American | 0.79% |
| Hispanic | 1.61% |
| Asian | 0.25% |
| Native American | 0.1% |
| Hawaiin/Pacific Islander | 0% |
| Race/Ethnicity | Percentage of Public School Students (2023) |
|---|---|
| White | 92.74% |
| African American | 1.18% |
| Hispanic | 2.25% |
| Asian | 0.68% |
| Native American | 0.17% |
| Hawaiin/Pacific Islander | 0.39% |