| Place Name | Big Sandy |
| Place Type | Town |
| ZIP Code(s) | 59520 |
| County | Chouteau County |
| Area Code(s) | 406 |
| Timezone | Mountain Standard Time (MST) |
| Population (2022) | 769 |
| Population Growth Rate (2010-19) | 1.17% |
| Majority Ethnicity | White 91.23% |
| US Congressional District(s) | Montana At-Large |
| State House Districts | 27 |
| State Senate Districts | 14 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 91.23% |
| African American | 1.32% |
| Hispanic | 6.62% |
| Asian | 0.83% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 0% |