| | Broadus, MT | Crow Agency, MT | United States |
| Population | 455 | 1,993 | 329,725,481 |
| Female Population | 51.7% | 53.5% | 50.5% |
| Male Population | 48.4% | 46.5% | 49.5% |
| Median Age | 41 | 23.9 | 38.4 |
| space3 | | | |
| Population - 2010 | 475 | 923 | 309,327,143 |
| Population - 2000 | 451 | 1,552 | 285,036,114 |
| Population - 1990 | 572 | 1,446 | 251,960,433 |
| Pop. 2000 to Now | 2.7% | 34.0% | 15.6% |
| Pop. 1990 to Now | -19.1% | 43.8% | 30.8% |
| space4 | | | |
| Population Density | 1,292.6 | 272.8 | 93.4 |
| Land Area | 0.4 | 7.3 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Broadus, MT | Crow Agency, MT | United States |
| Age 0 to 4 | 7.3% | 12.6% | 5.9% |
| Age 5 to 9 | 2.2% | 12.6% | 6.1% |
| Age 10 to 14 | 7.7% | 9.7% | 6.6% |
| Age 15 to 17 | 0.9% | 5.8% | 3.9% |
| Age 18 to 20 | 1.5% | 4.3% | 4.0% |
| Age 21 to 24 | 9.5% | 5.7% | 5.2% |
| Age 25 to 34 | 14.7% | 11.3% | 13.8% |
| Age 35 to 44 | 9.0% | 9.8% | 12.9% |
| Age 45 to 54 | 9.9% | 11.0% | 12.6% |
| Age 55 to 59 | 7.5% | 2.8% | 6.7% |
| Age 60 to 64 | 5.3% | 4.8% | 6.3% |
| Age 65 to 74 | 9.9% | 5.2% | 9.6% |
| Age 75 to 84 | 7.9% | 2.3% | 4.5% |
| Age 85 and over | 6.8% | 2.0% | 1.9% |
| space1 | | | |
| Race | | | |
| | Broadus, MT | Crow Agency, MT | United States |
| White | 89.0% | 2.1% | 59.4% |
| Black | 0.0% | 0.0% | 12.2% |
| Asian | 0.0% | 0.0% | 5.6% |
| Native American | 2.4% | 94.3% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 6.4% | 0.4% | 3.2% |
| Hispanic | 2.2% | 3.3% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Broadus, MT | Crow Agency, MT | United States |
| Married Population | 51.5% | 25.1% | 49.8% |
| Currently Married | 51.5% | 21.5% | 48.0% |
| Married but Separated | 0.0% | 3.6% | 1.8% |
| Single Population | 48.5% | 74.9% | 50.2% |
| Never Married | 30.8% | 53.6% | 33.8% |
| Divorced | 8.8% | 10.9% | 10.8% |
| Widowed | 9.0% | 10.3% | 5.6% |
| space5 | | | |
| Household Size | 2.32 | 4.95 | 2.60 |
| Households | 185 | 399 | 124,010,992 |
| Family Households | 115 | 273 | 80,755,759 |
| Married couple, w/children | 20.9% | 27.8% | 30.5% |
| Married couple, no children | 53.0% | 14.3% | 42.9% |
| Non Family Households | 70 | 126 | 43,255,233 |
| Single householder, w/children | 18.3% | 35.5% | 15.8% |
| Single householder, no children | 7.8% | 22.3% | 10.8% |