| | Bismarck, MI | Grass Lake, MI | United States |
| Population | 374 | 1,356 | 329,725,481 |
| Female Population | 46.5% | 50.7% | 50.5% |
| Male Population | 53.5% | 49.3% | 49.5% |
| Median Age | 60 | 31.9 | 38.4 |
| space3 | | | |
| Population - 2010 | 384 | 1,171 | 309,327,143 |
| Population - 2000 | 408 | 1,082 | 285,036,114 |
| Population - 1990 | 319 | 903 | 251,960,433 |
| Pop. 2000 to Now | -10.3% | 5.4% | 15.6% |
| Pop. 1990 to Now | 14.7% | 26.3% | 30.8% |
| space4 | | | |
| Population Density | 5.5 | 1,442.6 | 93.4 |
| Land Area | 67.5 | 0.9 | 3,531,905.4 |
| Water Area | 2.5 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Bismarck, MI | Grass Lake, MI | United States |
| Age 0 to 4 | 3.7% | 8.7% | 5.9% |
| Age 5 to 9 | 4.3% | 4.6% | 6.1% |
| Age 10 to 14 | 2.7% | 8.8% | 6.6% |
| Age 15 to 17 | 2.1% | 4.3% | 3.9% |
| Age 18 to 20 | 1.1% | 4.1% | 4.0% |
| Age 21 to 24 | 3.7% | 4.8% | 5.2% |
| Age 25 to 34 | 4.0% | 19.6% | 13.8% |
| Age 35 to 44 | 8.3% | 12.2% | 12.9% |
| Age 45 to 54 | 12.0% | 8.6% | 12.6% |
| Age 55 to 59 | 8.0% | 6.6% | 6.7% |
| Age 60 to 64 | 11.8% | 2.6% | 6.3% |
| Age 65 to 74 | 21.7% | 6.9% | 9.6% |
| Age 75 to 84 | 12.3% | 5.6% | 4.5% |
| Age 85 and over | 4.3% | 2.7% | 1.9% |
| space1 | | | |
| Race | | | |
| | Bismarck, MI | Grass Lake, MI | United States |
| White | 89.3% | 91.7% | 59.4% |
| Black | 0.0% | 0.0% | 12.2% |
| Asian | 1.6% | 1.0% | 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 | 2.1% | 1.2% | 3.2% |
| Hispanic | 7.0% | 6.1% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Bismarck, MI | Grass Lake, MI | United States |
| Married Population | 59.9% | 42.9% | 49.8% |
| Currently Married | 59.9% | 41.3% | 48.0% |
| Married but Separated | 0.0% | 1.5% | 1.8% |
| Single Population | 40.1% | 57.1% | 50.2% |
| Never Married | 19.8% | 34.5% | 33.8% |
| Divorced | 10.5% | 13.5% | 10.8% |
| Widowed | 9.9% | 9.1% | 5.6% |
| space5 | | | |
| Household Size | 2.06 | 2.70 | 2.60 |
| Households | 178 | 503 | 124,010,992 |
| Family Households | 102 | 287 | 80,755,759 |
| Married couple, w/children | 15.7% | 34.1% | 30.5% |
| Married couple, no children | 79.4% | 32.8% | 42.9% |
| Non Family Households | 76 | 216 | 43,255,233 |
| Single householder, w/children | 2.0% | 22.6% | 15.8% |
| Single householder, no children | 2.9% | 10.5% | 10.8% |