Lake Madison South Dakota Profile
| Place Name | Lake Madison |
| Place Type | Census Designated Place |
| ZIP Code(s) | 57042 57075 |
| County | Lake County |
| Area Code(s) | 605 |
| Timezone | Central Daylight Time (CDT) |
| Population (2022) | 529 |
| Population Growth Rate (2010-19) | 21.38% |
| Majority Ethnicity | White 95.54% |
| US Congressional District(s) | South Dakota At-Large |
| State House Districts | 8 |
| State Senate Districts | 8 |
Lake Madison Race/Ethnicity Data
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 95.54% |
| African American | 0% |
| Hispanic | 4.46% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 0% |