| Name | Jo Daviess County |
| State | Illinois |
| FIPS Code | 17085 |
| County Seat | Galena |
| Timezone | Central Daylight Time (CDT) |
| Population (2024) | 21,749 |
| Population Growth Rate(2020-2024) | -1.53% |
| Majority Ethnicity | White 94.22% |
| Public School Majority Ethnicity | White 87% |
| Partisan Voting Index | Republican:+9 |
| Unemployment Rate (May 2026) | 5.5% |
| Sales Tax Rate (2025) | 7.25% |
| Area Code(s) | 815 / 779 |
| Race/Ethnicity | Percentage of Population (2023) |
|---|---|
| White | 94.22% |
| African American | 0.83% |
| Hispanic | 4.02% |
| Asian | 0.57% |
| Native American | 0.31% |
| Hawaiin/Pacific Islander | 0.06% |
| Race/Ethnicity | Percentage of Public School Students (2023) |
|---|---|
| White | 86.64% |
| African American | 1.38% |
| Hispanic | 7.85% |
| Asian | 0.64% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 0.06% |