| | Vienna, MI | Sylvania, OH | United States |
| Population | 360 | 18,991 | 329,725,481 |
| Female Population | 43.1% | 51.2% | 50.5% |
| Male Population | 56.9% | 48.9% | 49.5% |
| Median Age | 61 | 41.5 | 38.4 |
| space3 | | | |
| Population - 2010 | 584 | 19,076 | 309,327,143 |
| Population - 2000 | 572 | 18,670 | 285,036,114 |
| Population - 1990 | 460 | 17,301 | 251,960,433 |
| Pop. 2000 to Now | -2.5% | 4.5% | 15.6% |
| Pop. 1990 to Now | 21.3% | 12.8% | 30.8% |
| space4 | | | |
| Population Density | 5.2 | 2,919.5 | 93.4 |
| Land Area | 69.1 | 6.5 | 3,531,905.4 |
| Water Area | 0.3 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Vienna, MI | Sylvania, OH | United States |
| Age 0 to 4 | 7.5% | 7.7% | 5.9% |
| Age 5 to 9 | 1.1% | 7.2% | 6.1% |
| Age 10 to 14 | 1.7% | 5.9% | 6.6% |
| Age 15 to 17 | 3.1% | 3.6% | 3.9% |
| Age 18 to 20 | 2.2% | 2.9% | 4.0% |
| Age 21 to 24 | 3.9% | 2.9% | 5.2% |
| Age 25 to 34 | 3.9% | 11.7% | 13.8% |
| Age 35 to 44 | 3.1% | 13.0% | 12.9% |
| Age 45 to 54 | 12.5% | 10.6% | 12.6% |
| Age 55 to 59 | 9.4% | 6.9% | 6.7% |
| Age 60 to 64 | 11.9% | 6.4% | 6.3% |
| Age 65 to 74 | 21.7% | 11.8% | 9.6% |
| Age 75 to 84 | 16.4% | 6.3% | 4.5% |
| Age 85 and over | 1.7% | 3.1% | 1.9% |
| space1 | | | |
| Race | | | |
| | Vienna, MI | Sylvania, OH | United States |
| White | 97.5% | 87.5% | 59.4% |
| Black | 0.0% | 1.9% | 12.2% |
| Asian | 0.0% | 2.0% | 5.6% |
| Native American | 1.1% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.6% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 0.0% | 3.9% | 3.2% |
| Hispanic | 0.8% | 4.7% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Vienna, MI | Sylvania, OH | United States |
| Married Population | 62.8% | 60.7% | 49.8% |
| Currently Married | 62.8% | 59.4% | 48.0% |
| Married but Separated | 0.0% | 1.3% | 1.8% |
| Single Population | 37.2% | 39.3% | 50.2% |
| Never Married | 16.7% | 23.5% | 33.8% |
| Divorced | 7.7% | 9.8% | 10.8% |
| Widowed | 12.7% | 6.0% | 5.6% |
| space5 | | | |
| Household Size | 2.13 | 2.52 | 2.60 |
| Households | 169 | 7,348 | 124,010,992 |
| Family Households | 103 | 5,121 | 80,755,759 |
| Married couple, w/children | 14.6% | 33.5% | 30.5% |
| Married couple, no children | 80.6% | 51.1% | 42.9% |
| Non Family Households | 66 | 2,227 | 43,255,233 |
| Single householder, w/children | 2.9% | 10.0% | 15.8% |
| Single householder, no children | 1.9% | 5.4% | 10.8% |