| Place Name | Pioneer Junction |
| Place Type | Census Designated Place |
| ZIP Code(s) | 59923 |
| GEOID | 3057950 |
| County | Lincoln County |
| Area Code(s) | 406 |
| Timezone | Mountain Standard Time (MST) |
| Population (2021) | 811 |
| Population Growth Rate (2010-19) | -5.94% |
| Majority Ethnicity | White 99.38% |
| US Congressional District(s) | Montana At-Large |
| State House Districts | 1 |
| State Senate Districts | 1 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 99.38% |
| African American | 0% |
| Hispanic | 0.62% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 0% |