| Name | Lyman County |
| State | South Dakota |
| FIPS Code | 46085 |
| Timezone | Central Daylight Time (CDT) |
| Population (2022) | 3,752 |
| Population Growth Rate(2000-2022) | -0.99% |
| Majority Ethnicity | White 56.81% |
| Public School Majority Ethnicity | Native American 67% |
| Partisan Voting Index | Republican:+17 |
| Unemployment Rate | 3.5% |
| Race/Ethnicy | Percentage of Population (2018) |
|---|---|
| White | 56.81% |
| African American | 0.08% |
| Hispanic | 2.38% |
| Asian | 0.49% |
| Native American | 40.12% |
| Hawaiin/Pacific Islander | 0.13% |
| Race/Ethnicy | Percentage of Public School Students (2018) |
|---|---|
| White | 31.28% |
| African American | 0% |
| Hispanic | 0.27% |
| Asian | 0% |
| Native American | 66.98% |
| Hawaiin/Pacific Islander | 0% |