| | Fontana, KS | Willoughby Hills, OH | United States |
| Population | 437 | 9,929 | 329,725,481 |
| Female Population | 57.7% | 52.2% | 50.5% |
| Male Population | 42.3% | 47.8% | 49.5% |
| Median Age | 16.5 | 37.5 | 38.4 |
| space3 | | | |
| Population - 2010 | 231 | 9,490 | 309,327,143 |
| Population - 2000 | 149 | 8,595 | 285,036,114 |
| Population - 1990 | 131 | 8,427 | 251,960,433 |
| Pop. 2000 to Now | 62.4% | 11.0% | 15.6% |
| Pop. 1990 to Now | 84.7% | 13.2% | 30.8% |
| space4 | | | |
| Population Density | 517.2 | 922.7 | 93.4 |
| Land Area | 0.8 | 10.8 | 3,531,905.4 |
| Water Area | 0.0 | 0.1 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Fontana, KS | Willoughby Hills, OH | United States |
| Age 0 to 4 | 8.2% | 4.8% | 5.9% |
| Age 5 to 9 | 8.9% | 4.1% | 6.1% |
| Age 10 to 14 | 30.0% | 5.6% | 6.6% |
| Age 15 to 17 | 5.5% | 3.4% | 3.9% |
| Age 18 to 20 | 1.4% | 2.4% | 4.0% |
| Age 21 to 24 | 2.1% | 5.7% | 5.2% |
| Age 25 to 34 | 11.7% | 17.1% | 13.8% |
| Age 35 to 44 | 19.5% | 14.4% | 12.9% |
| Age 45 to 54 | 4.8% | 10.0% | 12.6% |
| Age 55 to 59 | 1.8% | 7.5% | 6.7% |
| Age 60 to 64 | 1.4% | 7.2% | 6.3% |
| Age 65 to 74 | 3.7% | 9.0% | 9.6% |
| Age 75 to 84 | 0.5% | 7.1% | 4.5% |
| Age 85 and over | 0.7% | 1.6% | 1.9% |
| space1 | | | |
| Race | | | |
| | Fontana, KS | Willoughby Hills, OH | United States |
| White | 72.3% | 74.3% | 59.4% |
| Black | 0.0% | 16.8% | 12.2% |
| Asian | 0.0% | 6.3% | 5.6% |
| Native American | 1.8% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 0.7% | 0.4% | 3.2% |
| Hispanic | 25.2% | 2.2% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Fontana, KS | Willoughby Hills, OH | United States |
| Married Population | 53.7% | 49.6% | 49.8% |
| Currently Married | 53.7% | 48.5% | 48.0% |
| Married but Separated | 0.0% | 1.1% | 1.8% |
| Single Population | 46.3% | 50.4% | 50.2% |
| Never Married | 30.3% | 35.5% | 33.8% |
| Divorced | 12.1% | 11.1% | 10.8% |
| Widowed | 3.9% | 3.7% | 5.6% |
| space5 | | | |
| Household Size | 4.12 | 2.04 | 2.60 |
| Households | 106 | 4,861 | 124,010,992 |
| Family Households | 86 | 2,744 | 80,755,759 |
| Married couple, w/children | 47.7% | 24.4% | 30.5% |
| Married couple, no children | 18.6% | 47.5% | 42.9% |
| Non Family Households | 20 | 2,117 | 43,255,233 |
| Single householder, w/children | 33.7% | 15.8% | 15.8% |
| Single householder, no children | 0.0% | 12.3% | 10.8% |