| Name | Marshall County |
| State | South Dakota |
| FIPS Code | 46091 |
| County Seat | Britton |
| Timezone | Central Standard Time (CST) |
| Population (2022) | 4,631 |
| Population Growth Rate(2000-2022) | -7.52% |
| Majority Ethnicity | White 92.88% |
| Public School Majority Ethnicity | White 91% |
| Partisan Voting Index | Republican:+7 |
| Unemployment Rate (December 2024) | 1.3% |
| Area Code(s) | 605 |
| Race/Ethnicity | Percentage of Population (2022) |
|---|---|
| White | 92.88% |
| African American | 0.18% |
| Hispanic | 6.95% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 0% |
| Race/Ethnicity | Percentage of Public School Students (2023) |
|---|---|
| White | 91.14% |
| African American | 0.59% |
| Hispanic | 4.43% |
| Asian | 0.3% |
| Native American | 0.74% |
| Hawaiin/Pacific Islander | 0.15% |