| Name | Franklin County |
| State | Illinois |
| FIPS Code | 17055 |
| County Seat | Benton |
| Timezone | Central Daylight Time (CDT) |
| Population (2024) | 37,156 |
| Population Growth Rate(2020-2024) | -1.79% |
| Majority Ethnicity | White 97.15% |
| Public School Majority Ethnicity | White 94% |
| Partisan Voting Index | Strongly Republican:+26 |
| Unemployment Rate (May 2026) | 5.8% |
| Sales Tax Rate (2025) | 9.5% |
| Area Code(s) | 618 |
| Race/Ethnicity | Percentage of Population (2023) |
|---|---|
| White | 97.15% |
| African American | 0.46% |
| Hispanic | 1.93% |
| Asian | 0.38% |
| Native American | 0.08% |
| Hawaiin/Pacific Islander | 0% |
| Race/Ethnicity | Percentage of Public School Students (2023) |
|---|---|
| White | 93.65% |
| African American | 0.73% |
| Hispanic | 2.37% |
| Asian | 0.48% |
| Native American | 0.04% |
| Hawaiin/Pacific Islander | 0.02% |