| Place Name | Harlem |
| Place Type | City |
| ZIP Code(s) | 59526 |
| County | Blaine County |
| Area Code(s) | 406 |
| Timezone | Mountain Standard Time (MST) |
| Population (2022) | 887 |
| Population Growth Rate (2010-19) | -4.83% |
| Majority Ethnicity | White 54.56% |
| US Congressional District(s) | Montana At-Large |
| State House Districts | 32 |
| State Senate Districts | 16 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 54.56% |
| African American | 0% |
| Hispanic | 38.34% |
| Asian | 0.47% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 6.63% |