| Place Name | Custer |
| Place Type | City |
| ZIP Code(s) | 57730 |
| County | Custer County |
| Area Code(s) | 605 |
| Timezone | Mountain Daylight Time (MDT) |
| Population (2022) | 2,346 |
| Population Growth Rate (2010-19) | -7.16% |
| Majority Ethnicity | White 87.97% |
| US Congressional District(s) | South Dakota At-Large |
| State House Districts | 30 |
| State Senate Districts | 30 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 87.97% |
| African American | 3.05% |
| Hispanic | 3.95% |
| Asian | 0.38% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 4.65% |