| Name | Williamson County |
| State | Illinois |
| FIPS Code | 17199 |
| Timezone | Central Standard Time (CST) |
| Population (2022) | 66,335 |
| Population Growth Rate(2000-2022) | 1.2% |
| Majority Ethnicity | White 91.61% |
| Public School Majority Ethnicity | White 84% |
| Partisan Voting Index | Republican:+18 |
| Unemployment Rate | 4.9% |
| Race/Ethnicy | Percentage of Population (2018) |
|---|---|
| White | 91.61% |
| African American | 3.39% |
| Hispanic | 2.93% |
| Asian | 1.58% |
| Native American | 0.49% |
| Hawaiin/Pacific Islander | 0% |
| Race/Ethnicy | Percentage of Public School Students (2018) |
|---|---|
| White | 83.86% |
| African American | 5% |
| Hispanic | 2.78% |
| Asian | 1.02% |
| Native American | 0.26% |
| Hawaiin/Pacific Islander | 0.02% |