| Name | Lewis and Clark County |
| State | Montana |
| FIPS Code | 30049 |
| Timezone | Mountain Daylight Time (MDT) |
| Population (2020) | 70,973 |
| Population Growth Rate(2000-2020) | 11.95% |
| Majority Ethnicity | White 93.99% |
| Public School Majority Ethnicity | White 87% |
| Partisan Voting Index | Republican:+0 |
| Unemployment Rate | 2.3% |
| Race/Ethnicy | Percentage of Population (2018) |
|---|---|
| White | 93.99% |
| African American | 0.28% |
| Hispanic | 3.23% |
| Asian | 0.63% |
| Native American | 1.8% |
| Hawaiin/Pacific Islander | 0.07% |
| Race/Ethnicy | Percentage of Public School Students (2018) |
|---|---|
| White | 86.69% |
| African American | 0.68% |
| Hispanic | 4.07% |
| Asian | 0.83% |
| Native American | 3.13% |
| Hawaiin/Pacific Islander | 0.22% |