| Place Name | St. Xavier |
| Place Type | Census Designated Place |
| ZIP Code(s) | 59050 59075 |
| County | Big Horn County |
| Area Code(s) | 406 |
| Timezone | Mountain Daylight Time (MDT) |
| Population (2022) | 5 |
| Population Growth Rate (2010-19) | -6.02% |
| Majority Ethnicity | Native American 0% |
| US Congressional District(s) | Montana At-Large |
| State House Districts | 42 |
| State Senate Districts | 21 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 41.32% |
| African American | 0% |
| Hispanic | 58.68% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 0% |