| Name | Hamilton County |
| State | Illinois |
| FIPS Code | 17065 |
| County Seat | McLeansboro |
| Timezone | Central Standard Time (CST) |
| Population (2022) | 8,430 |
| Population Growth Rate(2000-2022) | -5.49% |
| Majority Ethnicity | White 98.68% |
| Public School Majority Ethnicity | White 96% |
| Partisan Voting Index | Strongly Republican:+28 |
| Unemployment Rate (December 2024) | 3.4% |
| Area Code(s) | 618 |
| Race/Ethnicity | Percentage of Population (2022) |
|---|---|
| White | 98.68% |
| African American | 0.1% |
| Hispanic | 0.17% |
| Asian | 0.44% |
| Native American | 0.31% |
| Hawaiin/Pacific Islander | 0.31% |
| Race/Ethnicity | Percentage of Public School Students (2023) |
|---|---|
| White | 95.72% |
| African American | 0.86% |
| Hispanic | 1.89% |
| Asian | 0.26% |
| Native American | 0.26% |
| Hawaiin/Pacific Islander | 0% |