| | Marysville, MI | Morton, IL | United States |
| Population | 9,925 | 16,591 | 329,725,481 |
| Female Population | 54.3% | 53.0% | 50.5% |
| Male Population | 45.7% | 47.0% | 49.5% |
| Median Age | 44.6 | 41.8 | 38.4 |
| space3 | | | |
| Population - 2010 | 9,936 | 16,372 | 309,327,143 |
| Population - 2000 | 9,684 | 15,198 | 285,036,114 |
| Population - 1990 | 8,515 | 13,799 | 251,960,433 |
| Pop. 2000 to Now | -0.4% | 6.8% | 15.6% |
| Pop. 1990 to Now | 13.3% | 17.6% | 30.8% |
| space4 | | | |
| Population Density | 1,354.4 | 1,274.2 | 93.4 |
| Land Area | 7.3 | 13.0 | 3,531,905.4 |
| Water Area | 1.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Marysville, MI | Morton, IL | United States |
| Age 0 to 4 | 5.0% | 5.6% | 5.9% |
| Age 5 to 9 | 5.5% | 6.6% | 6.1% |
| Age 10 to 14 | 7.1% | 7.8% | 6.6% |
| Age 15 to 17 | 5.4% | 4.8% | 3.9% |
| Age 18 to 20 | 2.0% | 2.3% | 4.0% |
| Age 21 to 24 | 3.6% | 3.0% | 5.2% |
| Age 25 to 34 | 10.2% | 10.2% | 13.8% |
| Age 35 to 44 | 11.7% | 13.0% | 12.9% |
| Age 45 to 54 | 14.1% | 10.6% | 12.6% |
| Age 55 to 59 | 6.6% | 6.2% | 6.7% |
| Age 60 to 64 | 7.0% | 7.8% | 6.3% |
| Age 65 to 74 | 13.7% | 12.3% | 9.6% |
| Age 75 to 84 | 5.8% | 6.5% | 4.5% |
| Age 85 and over | 2.3% | 3.2% | 1.9% |
| space1 | | | |
| Race | | | |
| | Marysville, MI | Morton, IL | United States |
| White | 96.5% | 93.1% | 59.4% |
| Black | 0.4% | 1.1% | 12.2% |
| Asian | 0.6% | 1.5% | 5.6% |
| Native American | 0.2% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 1.6% | 1.5% | 3.2% |
| Hispanic | 0.7% | 2.6% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Marysville, MI | Morton, IL | United States |
| Married Population | 53.2% | 61.8% | 49.8% |
| Currently Married | 53.1% | 61.1% | 48.0% |
| Married but Separated | 0.1% | 0.7% | 1.8% |
| Single Population | 46.8% | 38.2% | 50.2% |
| Never Married | 27.1% | 21.9% | 33.8% |
| Divorced | 13.2% | 9.9% | 10.8% |
| Widowed | 6.5% | 6.4% | 5.6% |
| space5 | | | |
| Household Size | 2.27 | 2.32 | 2.60 |
| Households | 4,371 | 7,026 | 124,010,992 |
| Family Households | 2,807 | 4,665 | 80,755,759 |
| Married couple, w/children | 24.6% | 33.4% | 30.5% |
| Married couple, no children | 50.4% | 52.6% | 42.9% |
| Non Family Households | 1,564 | 2,361 | 43,255,233 |
| Single householder, w/children | 19.6% | 9.9% | 15.8% |
| Single householder, no children | 5.4% | 4.1% | 10.8% |