| Name | Monroe County |
| State | Illinois |
| FIPS Code | 17133 |
| County Seat | Waterloo |
| Timezone | Central Standard Time (CST) |
| Population (2022) | 33,003 |
| Population Growth Rate(2000-2022) | 6.08% |
| Majority Ethnicity | White 98.61% |
| Public School Majority Ethnicity | White 93% |
| Partisan Voting Index | Republican:+16 |
| Unemployment Rate (December 2024) | 2.9% |
| Area Code(s) | 618 / 314 / 557 |
| Race/Ethnicity | Percentage of Population (2022) |
|---|---|
| White | 98.61% |
| African American | 0.63% |
| Hispanic | 0.13% |
| Asian | 0.63% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 0% |
| Race/Ethnicity | Percentage of Public School Students (2023) |
|---|---|
| White | 93.34% |
| African American | 0.44% |
| Hispanic | 3.01% |
| Asian | 0.64% |
| Native American | 0.15% |
| Hawaiin/Pacific Islander | 0.03% |