| Place Name | Madison |
| Place Type | City |
| ZIP Code(s) | 57042 |
| County | Lake County |
| Area Code(s) | 605 |
| Timezone | Central Daylight Time (CDT) |
| Population (2022) | 6,575 |
| Population Growth Rate (2010-19) | -4.37% |
| Majority Ethnicity | White 93.84% |
| US Congressional District(s) | South Dakota At-Large |
| State House Districts | 8 |
| State Senate Districts | 8 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 93.84% |
| African American | 0.36% |
| Hispanic | 2.3% |
| Asian | 0% |
| Native American | 0.06% |
| Hawaiin/Pacific Islander | 3.43% |