| | Kernville, CA | San Clemente, CA | United States |
| Population | 780 | 64,600 | 329,725,481 |
| Female Population | 53.1% | 49.3% | 50.5% |
| Male Population | 46.9% | 50.7% | 49.5% |
| Median Age | 38.9 | 43.8 | 38.4 |
| space3 | | | |
| Population - 2010 | 1,748 | 63,556 | 309,327,143 |
| Population - 2000 | 1,736 | 49,936 | 285,036,114 |
| Population - 1990 | 1,656 | 41,100 | 251,960,433 |
| Pop. 2000 to Now | -30.4% | 29.3% | 15.6% |
| Pop. 1990 to Now | -27.1% | 57.1% | 30.8% |
| space4 | | | |
| Population Density | 61.9 | 3,519.3 | 93.4 |
| Land Area | 12.6 | 18.4 | 3,531,905.4 |
| Water Area | 0.3 | 0.8 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Kernville, CA | San Clemente, CA | United States |
| Age 0 to 4 | 7.8% | 4.7% | 5.9% |
| Age 5 to 9 | 0.0% | 5.3% | 6.1% |
| Age 10 to 14 | 14.4% | 7.6% | 6.6% |
| Age 15 to 17 | 7.1% | 4.9% | 3.9% |
| Age 18 to 20 | 0.1% | 2.6% | 4.0% |
| Age 21 to 24 | 0.0% | 3.6% | 5.2% |
| Age 25 to 34 | 14.6% | 10.7% | 13.8% |
| Age 35 to 44 | 13.7% | 11.9% | 12.9% |
| Age 45 to 54 | 0.3% | 14.9% | 12.6% |
| Age 55 to 59 | 3.3% | 8.0% | 6.7% |
| Age 60 to 64 | 0.0% | 7.2% | 6.3% |
| Age 65 to 74 | 18.3% | 10.8% | 9.6% |
| Age 75 to 84 | 12.3% | 5.5% | 4.5% |
| Age 85 and over | 8.1% | 2.3% | 1.9% |
| space1 | | | |
| Race | | | |
| | Kernville, CA | San Clemente, CA | United States |
| White | 89.5% | 72.9% | 59.4% |
| Black | 0.3% | 1.5% | 12.2% |
| Asian | 2.2% | 5.0% | 5.6% |
| Native American | 0.0% | 0.1% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 1.0% | 0.2% | 0.4% |
| Two or More Races | 0.0% | 3.8% | 3.2% |
| Hispanic | 7.1% | 16.4% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Kernville, CA | San Clemente, CA | United States |
| Married Population | 46.1% | 60.0% | 49.8% |
| Currently Married | 46.1% | 58.9% | 48.0% |
| Married but Separated | 0.0% | 1.1% | 1.8% |
| Single Population | 53.9% | 40.0% | 50.2% |
| Never Married | 17.1% | 25.9% | 33.8% |
| Divorced | 11.0% | 9.2% | 10.8% |
| Widowed | 25.7% | 4.9% | 5.6% |
| space5 | | | |
| Household Size | 2.28 | 2.68 | 2.60 |
| Households | 331 | 24,006 | 124,010,992 |
| Family Households | 134 | 17,141 | 80,755,759 |
| Married couple, w/children | 38.8% | 34.0% | 30.5% |
| Married couple, no children | 61.2% | 51.2% | 42.9% |
| Non Family Households | 197 | 6,865 | 43,255,233 |
| Single householder, w/children | 0.0% | 9.1% | 15.8% |
| Single householder, no children | 0.0% | 5.7% | 10.8% |