| Place Name | Ridgeland Township |
| Place Type | Township |
| ZIP Code(s) | 57601 57642 57657 57658 |
| County | Corson County |
| Area Code(s) | 605 |
| Timezone | Mountain Standard Time (MST) |
| Population (2021) | 32 |
| Majority Ethnicity | White 75% |
| US Congressional District(s) | South Dakota At-Large |
| State House Districts | 28A |
| State Senate Districts | 28 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 75% |
| African American | 0% |
| Hispanic | 18.75% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 6.25% |