| Place Name | New Underwood |
| Place Type | City |
| ZIP Code(s) | 57761 |
| County | Pennington County |
| Area Code(s) | 605 |
| Timezone | Mountain Standard Time (MST) |
| Population (2022) | 628 |
| Population Growth Rate (2010-19) | -10.61% |
| Majority Ethnicity | White 74.41% |
| Metro/Micro Stats Area | Rapid City, SD |
| US Congressional District(s) | South Dakota At-Large |
| State House Districts | 30 |
| State Senate Districts | 30 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 74.41% |
| African American | 1.95% |
| Hispanic | 3.52% |
| Asian | 0.59% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 19.53% |