| | Vienna, NY | German Flatts, NY | United States |
| Population | 5,258 | 12,351 | 329,725,481 |
| Female Population | 49.9% | 51.6% | 50.5% |
| Male Population | 50.1% | 48.4% | 49.5% |
| Median Age | 50.2 | 42.8 | 38.4 |
| space3 | | | |
| Population - 2010 | 5,439 | 13,216 | 309,327,143 |
| Population - 2000 | 5,819 | 13,629 | 285,036,114 |
| Population - 1990 | 5,564 | 14,345 | 251,960,433 |
| Pop. 2000 to Now | -9.1% | -9.4% | 15.6% |
| Pop. 1990 to Now | -4.9% | -13.9% | 30.8% |
| space4 | | | |
| Population Density | 85.6 | 366.6 | 93.4 |
| Land Area | 61.4 | 33.7 | 3,531,905.4 |
| Water Area | 33.6 | 0.5 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Vienna, NY | German Flatts, NY | United States |
| Age 0 to 4 | 3.2% | 4.5% | 5.9% |
| Age 5 to 9 | 5.2% | 8.8% | 6.1% |
| Age 10 to 14 | 6.6% | 7.1% | 6.6% |
| Age 15 to 17 | 3.4% | 3.6% | 3.9% |
| Age 18 to 20 | 1.0% | 3.3% | 4.0% |
| Age 21 to 24 | 2.8% | 2.8% | 5.2% |
| Age 25 to 34 | 10.1% | 14.0% | 13.8% |
| Age 35 to 44 | 12.2% | 7.5% | 12.9% |
| Age 45 to 54 | 11.2% | 14.5% | 12.6% |
| Age 55 to 59 | 16.3% | 7.1% | 6.7% |
| Age 60 to 64 | 9.4% | 7.3% | 6.3% |
| Age 65 to 74 | 13.1% | 11.7% | 9.6% |
| Age 75 to 84 | 4.1% | 5.2% | 4.5% |
| Age 85 and over | 1.4% | 2.7% | 1.9% |
| space1 | | | |
| Race | | | |
| | Vienna, NY | German Flatts, NY | United States |
| White | 97.2% | 92.6% | 59.4% |
| Black | 0.5% | 1.8% | 12.2% |
| Asian | 0.0% | 1.1% | 5.6% |
| Native American | 0.1% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 0.4% | 2.6% | 3.2% |
| Hispanic | 1.7% | 1.9% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Vienna, NY | German Flatts, NY | United States |
| Married Population | 59.7% | 49.7% | 49.8% |
| Currently Married | 57.2% | 48.0% | 48.0% |
| Married but Separated | 2.6% | 1.7% | 1.8% |
| Single Population | 40.3% | 50.3% | 50.2% |
| Never Married | 22.8% | 29.5% | 33.8% |
| Divorced | 13.0% | 14.5% | 10.8% |
| Widowed | 4.5% | 6.3% | 5.6% |
| space5 | | | |
| Household Size | 2.46 | 2.45 | 2.60 |
| Households | 2,140 | 4,960 | 124,010,992 |
| Family Households | 1,519 | 3,092 | 80,755,759 |
| Married couple, w/children | 29.0% | 26.0% | 30.5% |
| Married couple, no children | 51.0% | 48.2% | 42.9% |
| Non Family Households | 621 | 1,868 | 43,255,233 |
| Single householder, w/children | 11.7% | 14.0% | 15.8% |
| Single householder, no children | 8.4% | 11.8% | 10.8% |