| Place Name | West Custer |
| Place Type | Unincorporated Territory |
| County | Custer County |
| Area Code(s) | 605 |
| Timezone | Mountain Daylight Time (MDT) |
| Population (2021) | 4,192 |
| Majority Ethnicity | White 94.77% |
| US Congressional District(s) | South Dakota At-Large |
| State House Districts | 30 |
| State Senate Districts | 30 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 94.77% |
| African American | 0.12% |
| Hispanic | 1.93% |
| Asian | 0.32% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 2.86% |