| Name | Jefferson County |
| State | Missouri |
| FIPS Code | 29099 |
| Timezone | Central Daylight Time (CDT) |
| Population (2022) | 218,628 |
| Population Growth Rate(2000-2022) | 3.66% |
| Majority Ethnicity | White 95.47% |
| Public School Majority Ethnicity | White 93% |
| Partisan Voting Index | Republican:+16 |
| Unemployment Rate | 3.6% |
| Race/Ethnicy | Percentage of Population (2018) |
|---|---|
| White | 95.47% |
| African American | 1.05% |
| Hispanic | 2.31% |
| Asian | 1.03% |
| Native American | 0.11% |
| Hawaiin/Pacific Islander | 0.03% |
| Race/Ethnicy | Percentage of Public School Students (2018) |
|---|---|
| White | 92.71% |
| African American | 1.63% |
| Hispanic | 2.27% |
| Asian | 0.74% |
| Native American | 0.19% |
| Hawaiin/Pacific Islander | 0.04% |