| | South Euclid, OH | Visalia, CA | United States |
| Population | 21,882 | 140,109 | 329,725,481 |
| Female Population | 50.5% | 51.3% | 50.5% |
| Male Population | 49.5% | 48.7% | 49.5% |
| Median Age | 36.6 | 32.6 | 38.4 |
| space3 | | | |
| Population - 2010 | 22,260 | 124,764 | 309,327,143 |
| Population - 2000 | 23,537 | 91,565 | 285,036,114 |
| Population - 1990 | 23,866 | 75,636 | 251,960,433 |
| Pop. 2000 to Now | -10.2% | 47.4% | 15.6% |
| Pop. 1990 to Now | -11.4% | 78.5% | 30.8% |
| space4 | | | |
| Population Density | 4,704.8 | 3,697.9 | 93.4 |
| Land Area | 4.7 | 37.9 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | South Euclid, OH | Visalia, CA | United States |
| Age 0 to 4 | 5.5% | 8.0% | 5.9% |
| Age 5 to 9 | 5.6% | 8.5% | 6.1% |
| Age 10 to 14 | 6.1% | 7.9% | 6.6% |
| Age 15 to 17 | 5.0% | 4.8% | 3.9% |
| Age 18 to 20 | 7.4% | 4.5% | 4.0% |
| Age 21 to 24 | 7.5% | 4.5% | 5.2% |
| Age 25 to 34 | 10.3% | 15.6% | 13.8% |
| Age 35 to 44 | 13.7% | 12.9% | 12.9% |
| Age 45 to 54 | 12.1% | 10.7% | 12.6% |
| Age 55 to 59 | 5.7% | 5.0% | 6.7% |
| Age 60 to 64 | 7.5% | 5.1% | 6.3% |
| Age 65 to 74 | 8.5% | 7.5% | 9.6% |
| Age 75 to 84 | 4.0% | 3.1% | 4.5% |
| Age 85 and over | 1.1% | 1.9% | 1.9% |
| space1 | | | |
| Race | | | |
| | South Euclid, OH | Visalia, CA | United States |
| White | 43.3% | 36.5% | 59.4% |
| Black | 49.0% | 2.1% | 12.2% |
| Asian | 0.9% | 5.9% | 5.6% |
| Native American | 0.1% | 0.4% | 0.6% |
| Hawaiian, Pacific Islander | 0.1% | 0.0% | 0.2% |
| Other | 1.1% | 0.0% | 0.4% |
| Two or More Races | 3.7% | 2.0% | 3.2% |
| Hispanic | 1.8% | 53.0% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | South Euclid, OH | Visalia, CA | United States |
| Married Population | 41.1% | 49.7% | 49.8% |
| Currently Married | 39.4% | 47.8% | 48.0% |
| Married but Separated | 1.7% | 1.9% | 1.8% |
| Single Population | 58.9% | 50.3% | 50.2% |
| Never Married | 43.9% | 34.8% | 33.8% |
| Divorced | 10.4% | 10.8% | 10.8% |
| Widowed | 4.5% | 4.7% | 5.6% |
| space5 | | | |
| Household Size | 2.45 | 3.05 | 2.60 |
| Households | 8,632 | 45,376 | 124,010,992 |
| Family Households | 5,470 | 33,473 | 80,755,759 |
| Married couple, w/children | 21.9% | 33.6% | 30.5% |
| Married couple, no children | 38.9% | 35.1% | 42.9% |
| Non Family Households | 3,162 | 11,903 | 43,255,233 |
| Single householder, w/children | 24.3% | 19.8% | 15.8% |
| Single householder, no children | 14.9% | 11.4% | 10.8% |