| Name | Grundy County |
| State | Illinois |
| FIPS Code | 17063 |
| County Seat | Morris |
| Timezone | Central Standard Time (CST) |
| Population (2022) | 49,870 |
| Population Growth Rate(2000-2022) | 4.93% |
| Majority Ethnicity | White 97.31% |
| Public School Majority Ethnicity | White 79% |
| Partisan Voting Index | Republican:+10 |
| Unemployment Rate (December 2024) | 5.4% |
| Area Code(s) | 815 / 779 |
| Race/Ethnicity | Percentage of Population (2022) |
|---|---|
| White | 97.31% |
| African American | 1.95% |
| Hispanic | 0.1% |
| Asian | 0.64% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 0% |
| Race/Ethnicity | Percentage of Public School Students (2023) |
|---|---|
| White | 78.72% |
| African American | 2.05% |
| Hispanic | 14.96% |
| Asian | 0.71% |
| Native American | 0.31% |
| Hawaiin/Pacific Islander | 0.09% |