| | Viola, IL | Stronghurst, IL | United States |
| Population | 1,141 | 988 | 329,725,481 |
| Female Population | 52.6% | 57.5% | 50.5% |
| Male Population | 47.4% | 42.5% | 49.5% |
| Median Age | 35.9 | 36.3 | 38.4 |
| space3 | | | |
| Population - 2010 | 956 | 884 | 309,327,143 |
| Population - 2000 | 956 | 896 | 285,036,114 |
| Population - 1990 | 964 | 799 | 251,960,433 |
| Pop. 2000 to Now | -8.6% | -13.6% | 15.6% |
| Pop. 1990 to Now | -9.3% | -3.1% | 30.8% |
| space4 | | | |
| Population Density | 1,361.6 | 1,099.0 | 93.4 |
| Land Area | 0.8 | 0.9 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Viola, IL | Stronghurst, IL | United States |
| Age 0 to 4 | 8.5% | 10.2% | 5.9% |
| Age 5 to 9 | 8.4% | 6.5% | 6.1% |
| Age 10 to 14 | 7.3% | 6.2% | 6.6% |
| Age 15 to 17 | 3.7% | 8.9% | 3.9% |
| Age 18 to 20 | 3.1% | 2.2% | 4.0% |
| Age 21 to 24 | 3.0% | 4.7% | 5.2% |
| Age 25 to 34 | 14.1% | 9.5% | 13.8% |
| Age 35 to 44 | 11.6% | 14.3% | 12.9% |
| Age 45 to 54 | 13.1% | 7.4% | 12.6% |
| Age 55 to 59 | 6.7% | 6.9% | 6.7% |
| Age 60 to 64 | 7.0% | 3.1% | 6.3% |
| Age 65 to 74 | 7.3% | 6.2% | 9.6% |
| Age 75 to 84 | 5.3% | 8.4% | 4.5% |
| Age 85 and over | 1.1% | 5.6% | 1.9% |
| space1 | | | |
| Race | | | |
| | Viola, IL | Stronghurst, IL | United States |
| White | 92.3% | 95.9% | 59.4% |
| Black | 0.0% | 0.2% | 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 | 3.2% | 2.7% | 3.2% |
| Hispanic | 4.6% | 1.2% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Viola, IL | Stronghurst, IL | United States |
| Married Population | 57.5% | 52.6% | 49.8% |
| Currently Married | 55.6% | 52.0% | 48.0% |
| Married but Separated | 1.9% | 0.7% | 1.8% |
| Single Population | 42.5% | 47.4% | 50.2% |
| Never Married | 30.5% | 24.9% | 33.8% |
| Divorced | 8.0% | 9.2% | 10.8% |
| Widowed | 4.0% | 13.3% | 5.6% |
| space5 | | | |
| Household Size | 2.81 | 2.78 | 2.60 |
| Households | 406 | 342 | 124,010,992 |
| Family Households | 298 | 239 | 80,755,759 |
| Married couple, w/children | 30.9% | 44.8% | 30.5% |
| Married couple, no children | 45.6% | 37.2% | 42.9% |
| Non Family Households | 108 | 103 | 43,255,233 |
| Single householder, w/children | 19.1% | 10.9% | 15.8% |
| Single householder, no children | 4.4% | 7.1% | 10.8% |