| | Sangrey, MT | Parker School, MT | United States |
| Population | 443 | 608 | 329,725,481 |
| Female Population | 43.3% | 58.7% | 50.5% |
| Male Population | 56.7% | 41.3% | 49.5% |
| Median Age | 20.9 | 20.6 | 38.4 |
| space3 | | | |
| Population - 2010 | 375 | 303 | 309,327,143 |
| Population - 2000 | 263 | 352 | 285,036,114 |
| Population - 1990 | 372 | 354 | 251,960,433 |
| Pop. 2000 to Now | 1.5% | 46.9% | 15.6% |
| Pop. 1990 to Now | -28.2% | 46.1% | 30.8% |
| space4 | | | |
| Population Density | 70.2 | 82.4 | 93.4 |
| Land Area | 6.3 | 7.4 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Sangrey, MT | Parker School, MT | United States |
| Age 0 to 4 | 11.3% | 17.1% | 5.9% |
| Age 5 to 9 | 7.9% | 6.6% | 6.1% |
| Age 10 to 14 | 9.7% | 10.2% | 6.6% |
| Age 15 to 17 | 9.3% | 13.5% | 3.9% |
| Age 18 to 20 | 12.4% | 3.6% | 4.0% |
| Age 21 to 24 | 2.3% | 5.3% | 5.2% |
| Age 25 to 34 | 17.6% | 13.2% | 13.8% |
| Age 35 to 44 | 4.3% | 5.8% | 12.9% |
| Age 45 to 54 | 17.8% | 11.7% | 12.6% |
| Age 55 to 59 | 2.0% | 5.4% | 6.7% |
| Age 60 to 64 | 0.0% | 1.5% | 6.3% |
| Age 65 to 74 | 5.4% | 6.3% | 9.6% |
| Age 75 to 84 | 0.0% | 0.0% | 4.5% |
| Age 85 and over | 0.0% | 0.0% | 1.9% |
| space1 | | | |
| Race | | | |
| | Sangrey, MT | Parker School, MT | United States |
| White | 0.0% | 1.2% | 59.4% |
| Black | 0.0% | 0.0% | 12.2% |
| Asian | 0.0% | 0.0% | 5.6% |
| Native American | 94.6% | 96.7% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 0.0% | 2.1% | 3.2% |
| Hispanic | 5.4% | 0.0% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Sangrey, MT | Parker School, MT | United States |
| Married Population | 30.5% | 43.5% | 49.8% |
| Currently Married | 30.5% | 40.3% | 48.0% |
| Married but Separated | 0.0% | 3.2% | 1.8% |
| Single Population | 69.5% | 56.5% | 50.2% |
| Never Married | 61.9% | 46.8% | 33.8% |
| Divorced | 3.8% | 4.0% | 10.8% |
| Widowed | 3.8% | 5.7% | 5.6% |
| space5 | | | |
| Household Size | 5.21 | 6.54 | 2.60 |
| Households | 85 | 93 | 124,010,992 |
| Family Households | 85 | 93 | 80,755,759 |
| Married couple, w/children | 32.9% | 48.4% | 30.5% |
| Married couple, no children | 3.5% | 21.5% | 42.9% |
| Non Family Households | 0 | 0 | 43,255,233 |
| Single householder, w/children | 49.4% | 30.1% | 15.8% |
| Single householder, no children | 14.1% | 0.0% | 10.8% |