| Place Name | Darby |
| Place Type | Town |
| ZIP Code(s) | 59829 |
| County | Ravalli County |
| Area Code(s) | 406 |
| Timezone | Mountain Standard Time (MST) |
| Population (2022) | 616 |
| Population Growth Rate (2010-19) | 8.75% |
| Majority Ethnicity | White 89.43% |
| US Congressional District(s) | Montana At-Large |
| State House Districts | 85 |
| State Senate Districts | 43 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 89.43% |
| African American | 0.17% |
| Hispanic | 1.51% |
| Asian | 7.72% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 1.17% |