| Name | Grundy County |
| State | Illinois |
| FIPS Code | 17063 |
| County Seat | Morris |
| Timezone | Central Daylight Time (CDT) |
| Population (2024) | 53,587 |
| Population Growth Rate(2020-2024) | 1.93% |
| Majority Ethnicity | White 86.21% |
| Public School Majority Ethnicity | White 79% |
| Partisan Voting Index | Republican:+15 |
| Unemployment Rate (May 2026) | 5.6% |
| Sales Tax Rate (2025) | 6.25% |
| Area Code(s) | 815 / 779 |
| Race/Ethnicity | Percentage of Population (2023) |
|---|---|
| White | 86.21% |
| African American | 2.08% |
| Hispanic | 11.21% |
| Asian | 0.43% |
| Native American | 0.08% |
| 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% |