| | La Crescenta-Montrose, CA | Benicia, CA | United States |
| Population | 20,149 | 27,191 | 329,725,481 |
| Female Population | 50.7% | 51.2% | 50.5% |
| Male Population | 49.4% | 48.8% | 49.5% |
| Median Age | 42.3 | 45.1 | 38.4 |
| space3 | | | |
| Population - 2010 | 19,927 | 27,058 | 309,327,143 |
| Population - 2000 | 18,532 | 26,865 | 285,036,114 |
| Population - 1990 | 16,968 | 24,437 | 251,960,433 |
| Pop. 2000 to Now | 4.7% | 4.2% | 15.6% |
| Pop. 1990 to Now | 14.3% | 14.5% | 30.8% |
| space4 | | | |
| Population Density | 5,877.8 | 2,106.5 | 93.4 |
| Land Area | 3.4 | 12.9 | 3,531,905.4 |
| Water Area | 0.0 | 2.8 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | La Crescenta-Montrose, CA | Benicia, CA | United States |
| Age 0 to 4 | 5.2% | 5.0% | 5.9% |
| Age 5 to 9 | 7.1% | 5.6% | 6.1% |
| Age 10 to 14 | 8.5% | 6.2% | 6.6% |
| Age 15 to 17 | 3.2% | 4.0% | 3.9% |
| Age 18 to 20 | 2.5% | 3.0% | 4.0% |
| Age 21 to 24 | 3.6% | 3.0% | 5.2% |
| Age 25 to 34 | 9.5% | 10.3% | 13.8% |
| Age 35 to 44 | 15.2% | 12.7% | 12.9% |
| Age 45 to 54 | 14.0% | 13.5% | 12.6% |
| Age 55 to 59 | 8.2% | 8.3% | 6.7% |
| Age 60 to 64 | 5.6% | 7.4% | 6.3% |
| Age 65 to 74 | 10.6% | 13.9% | 9.6% |
| Age 75 to 84 | 4.4% | 4.7% | 4.5% |
| Age 85 and over | 2.4% | 2.2% | 1.9% |
| space1 | | | |
| Race | | | |
| | La Crescenta-Montrose, CA | Benicia, CA | United States |
| White | 46.9% | 61.4% | 59.4% |
| Black | 0.4% | 3.6% | 12.2% |
| Asian | 26.4% | 11.4% | 5.6% |
| Native American | 0.1% | 0.1% | 0.6% |
| Hawaiian, Pacific Islander | 0.3% | 0.5% | 0.2% |
| Other | 0.2% | 0.6% | 0.4% |
| Two or More Races | 7.8% | 8.6% | 3.2% |
| Hispanic | 18.0% | 13.9% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | La Crescenta-Montrose, CA | Benicia, CA | United States |
| Married Population | 58.5% | 54.8% | 49.8% |
| Currently Married | 57.4% | 53.8% | 48.0% |
| Married but Separated | 1.1% | 1.0% | 1.8% |
| Single Population | 41.5% | 45.2% | 50.2% |
| Never Married | 28.2% | 25.9% | 33.8% |
| Divorced | 8.6% | 13.0% | 10.8% |
| Widowed | 4.7% | 6.2% | 5.6% |
| space5 | | | |
| Household Size | 2.81 | 2.51 | 2.60 |
| Households | 7,167 | 10,844 | 124,010,992 |
| Family Households | 4,974 | 7,136 | 80,755,759 |
| Married couple, w/children | 42.5% | 31.4% | 30.5% |
| Married couple, no children | 40.6% | 48.4% | 42.9% |
| Non Family Households | 2,193 | 3,708 | 43,255,233 |
| Single householder, w/children | 6.3% | 13.1% | 15.8% |
| Single householder, no children | 10.6% | 7.2% | 10.8% |