| | South San Gabriel, CA | Eastvale, CA | United States |
| Population | 7,653 | 68,539 | 329,725,481 |
| Female Population | 51.8% | 50.5% | 50.5% |
| Male Population | 48.2% | 49.5% | 49.5% |
| Median Age | 43.8 | 34.2 | 38.4 |
| space3 | | | |
| Population - 2010 | 8,136 | 53,958 | 309,327,143 |
| Population - 2000 | 7,595 | 3,904 | 285,036,114 |
| Population - 1990 | 7,700 | 3,133 | 251,960,433 |
| Pop. 2000 to Now | 16.5% | 1,622.1% | 15.6% |
| Pop. 1990 to Now | 14.9% | 2,045.9% | 30.8% |
| space4 | | | |
| Population Density | 9,187.3 | 5,412.5 | 93.4 |
| Land Area | 0.8 | 12.7 | 3,531,905.4 |
| Water Area | 0.0 | 0.5 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | South San Gabriel, CA | Eastvale, CA | United States |
| Age 0 to 4 | 5.6% | 8.1% | 5.9% |
| Age 5 to 9 | 3.2% | 7.5% | 6.1% |
| Age 10 to 14 | 4.8% | 9.3% | 6.6% |
| Age 15 to 17 | 6.1% | 4.8% | 3.9% |
| Age 18 to 20 | 2.4% | 3.9% | 4.0% |
| Age 21 to 24 | 3.4% | 5.2% | 5.2% |
| Age 25 to 34 | 13.7% | 12.3% | 13.8% |
| Age 35 to 44 | 12.5% | 17.5% | 12.9% |
| Age 45 to 54 | 9.6% | 14.3% | 12.6% |
| Age 55 to 59 | 9.2% | 5.4% | 6.7% |
| Age 60 to 64 | 9.1% | 3.7% | 6.3% |
| Age 65 to 74 | 10.6% | 5.1% | 9.6% |
| Age 75 to 84 | 5.6% | 2.4% | 4.5% |
| Age 85 and over | 4.3% | 0.5% | 1.9% |
| space1 | | | |
| Race | | | |
| | South San Gabriel, CA | Eastvale, CA | United States |
| White | 5.6% | 21.7% | 59.4% |
| Black | 0.3% | 7.3% | 12.2% |
| Asian | 66.4% | 27.7% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.3% | 0.2% |
| Other | 0.0% | 0.5% | 0.4% |
| Two or More Races | 0.7% | 3.2% | 3.2% |
| Hispanic | 27.1% | 39.3% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | South San Gabriel, CA | Eastvale, CA | United States |
| Married Population | 50.0% | 58.5% | 49.8% |
| Currently Married | 49.0% | 57.1% | 48.0% |
| Married but Separated | 1.0% | 1.4% | 1.8% |
| Single Population | 50.0% | 41.5% | 50.2% |
| Never Married | 35.2% | 32.0% | 33.8% |
| Divorced | 7.1% | 6.8% | 10.8% |
| Widowed | 7.7% | 2.8% | 5.6% |
| space5 | | | |
| Household Size | 3.38 | 4.10 | 2.60 |
| Households | 2,205 | 16,713 | 124,010,992 |
| Family Households | 1,844 | 15,166 | 80,755,759 |
| Married couple, w/children | 34.4% | 53.1% | 30.5% |
| Married couple, no children | 36.9% | 31.1% | 42.9% |
| Non Family Households | 361 | 1,547 | 43,255,233 |
| Single householder, w/children | 6.6% | 10.7% | 15.8% |
| Single householder, no children | 22.1% | 5.1% | 10.8% |