| Name | Winnebago County |
| State | Illinois |
| FIPS Code | 17201 |
| County Seat | Rockford |
| Timezone | Central Daylight Time (CDT) |
| Population (2024) | 282,214 |
| Population Growth Rate(2020-2024) | -1.12% |
| Majority Ethnicity | White 68.53% |
| Public School Majority Ethnicity | White 44% |
| Partisan Voting Index | Democratic:+0 |
| Unemployment Rate (May 2026) | 6.6% |
| Sales Tax Rate (2025) | 7.75% |
| Area Code(s) | 815 / 779 |
| Race/Ethnicity | Percentage of Population (2023) |
|---|---|
| White | 68.53% |
| African American | 13.24% |
| Hispanic | 14.87% |
| Asian | 2.83% |
| Native American | 0.5% |
| Hawaiin/Pacific Islander | 0.04% |
| Race/Ethnicity | Percentage of Public School Students (2023) |
|---|---|
| White | 43.76% |
| African American | 21.21% |
| Hispanic | 24.62% |
| Asian | 2.95% |
| Native American | 0.22% |
| Hawaiin/Pacific Islander | 0.07% |