| | Osakis, MN | Brandon, MN | United States |
| Population | 1,676 | 608 | 329,725,481 |
| Female Population | 54.5% | 56.3% | 50.5% |
| Male Population | 45.5% | 43.8% | 49.5% |
| Median Age | 50.4 | 40.6 | 38.4 |
| space3 | | | |
| Population - 2010 | 1,740 | 486 | 309,327,143 |
| Population - 2000 | 1,567 | 450 | 285,036,114 |
| Population - 1990 | 1,256 | 441 | 251,960,433 |
| Pop. 2000 to Now | 11.2% | 8.7% | 15.6% |
| Pop. 1990 to Now | 38.7% | 10.9% | 30.8% |
| space4 | | | |
| Population Density | 866.6 | 1,256.2 | 93.4 |
| Land Area | 1.9 | 0.5 | 3,531,905.4 |
| Water Area | 0.1 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Osakis, MN | Brandon, MN | United States |
| Age 0 to 4 | 2.3% | 1.6% | 5.9% |
| Age 5 to 9 | 6.0% | 3.8% | 6.1% |
| Age 10 to 14 | 6.3% | 12.7% | 6.6% |
| Age 15 to 17 | 5.4% | 4.9% | 3.9% |
| Age 18 to 20 | 2.0% | 5.1% | 4.0% |
| Age 21 to 24 | 1.4% | 3.3% | 5.2% |
| Age 25 to 34 | 9.8% | 9.2% | 13.8% |
| Age 35 to 44 | 10.9% | 17.4% | 12.9% |
| Age 45 to 54 | 11.0% | 18.4% | 12.6% |
| Age 55 to 59 | 6.1% | 1.0% | 6.7% |
| Age 60 to 64 | 10.1% | 3.6% | 6.3% |
| Age 65 to 74 | 12.3% | 8.1% | 9.6% |
| Age 75 to 84 | 9.4% | 6.9% | 4.5% |
| Age 85 and over | 6.9% | 3.9% | 1.9% |
| space1 | | | |
| Race | | | |
| | Osakis, MN | Brandon, MN | United States |
| White | 98.0% | 96.2% | 59.4% |
| Black | 0.0% | 1.8% | 12.2% |
| Asian | 0.0% | 0.0% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 1.1% | 1.5% | 3.2% |
| Hispanic | 0.8% | 0.5% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Osakis, MN | Brandon, MN | United States |
| Married Population | 48.7% | 57.2% | 49.8% |
| Currently Married | 47.7% | 57.2% | 48.0% |
| Married but Separated | 1.0% | 0.0% | 1.8% |
| Single Population | 51.3% | 42.8% | 50.2% |
| Never Married | 22.9% | 28.5% | 33.8% |
| Divorced | 19.1% | 7.4% | 10.8% |
| Widowed | 9.2% | 6.8% | 5.6% |
| space5 | | | |
| Household Size | 1.94 | 2.52 | 2.60 |
| Households | 840 | 241 | 124,010,992 |
| Family Households | 450 | 138 | 80,755,759 |
| Married couple, w/children | 31.8% | 50.0% | 30.5% |
| Married couple, no children | 44.2% | 38.4% | 42.9% |
| Non Family Households | 390 | 103 | 43,255,233 |
| Single householder, w/children | 13.8% | 4.3% | 15.8% |
| Single householder, no children | 10.2% | 7.2% | 10.8% |