| Name | Saint Charles County |
| State | Missouri |
| FIPS Code | 29183 |
| Timezone | Central Daylight Time (CDT) |
| Population (2022) | 360,695 |
| Population Growth Rate(2000-2022) | 12.42% |
| Majority Ethnicity | White 89.74% |
| Public School Majority Ethnicity | White 80% |
| Partisan Voting Index | Republican:+9 |
| Unemployment Rate | 3.4% |
| Race/Ethnicy | Percentage of Population (2018) |
|---|---|
| White | 89.74% |
| African American | 4.39% |
| Hispanic | 3.21% |
| Asian | 2.48% |
| Native American | 0.17% |
| Hawaiin/Pacific Islander | 0.01% |
| Race/Ethnicy | Percentage of Public School Students (2018) |
|---|---|
| White | 80.07% |
| African American | 7.36% |
| Hispanic | 5.1% |
| Asian | 3.09% |
| Native American | 0.17% |
| Hawaiin/Pacific Islander | 0.11% |