| | Rolling Hills, CA | Marina del Rey, CA | United States |
| Population | 1,436 | 9,355 | 329,725,481 |
| Female Population | 51.3% | 50.2% | 50.5% |
| Male Population | 48.7% | 49.8% | 49.5% |
| Median Age | 55.1 | 37.1 | 38.4 |
| space3 | | | |
| Population - 2010 | 1,862 | 9,196 | 309,327,143 |
| Population - 2000 | 1,871 | 8,176 | 285,036,114 |
| Population - 1990 | 1,871 | 7,431 | 251,960,433 |
| Pop. 2000 to Now | -2.9% | 17.0% | 15.6% |
| Pop. 1990 to Now | -2.9% | 28.7% | 30.8% |
| space4 | | | |
| Population Density | 480.1 | 10,903.3 | 93.4 |
| Land Area | 3.0 | 0.9 | 3,531,905.4 |
| Water Area | 0.0 | 0.6 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Rolling Hills, CA | Marina del Rey, CA | United States |
| Age 0 to 4 | 1.9% | 8.0% | 5.9% |
| Age 5 to 9 | 5.6% | 1.7% | 6.1% |
| Age 10 to 14 | 7.0% | 1.1% | 6.6% |
| Age 15 to 17 | 6.1% | 0.1% | 3.9% |
| Age 18 to 20 | 2.3% | 1.3% | 4.0% |
| Age 21 to 24 | 3.2% | 9.1% | 5.2% |
| Age 25 to 34 | 4.6% | 18.6% | 13.8% |
| Age 35 to 44 | 4.1% | 27.8% | 12.9% |
| Age 45 to 54 | 14.9% | 15.3% | 12.6% |
| Age 55 to 59 | 11.2% | 7.7% | 6.7% |
| Age 60 to 64 | 8.7% | 1.9% | 6.3% |
| Age 65 to 74 | 14.4% | 3.6% | 9.6% |
| Age 75 to 84 | 10.5% | 2.3% | 4.5% |
| Age 85 and over | 5.4% | 1.3% | 1.9% |
| space1 | | | |
| Race | | | |
| | Rolling Hills, CA | Marina del Rey, CA | United States |
| White | 60.0% | 73.5% | 59.4% |
| Black | 10.4% | 6.7% | 12.2% |
| Asian | 17.5% | 6.5% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.6% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 6.3% | 4.9% | 3.2% |
| Hispanic | 5.6% | 7.8% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Rolling Hills, CA | Marina del Rey, CA | United States |
| Married Population | 67.3% | 47.9% | 49.8% |
| Currently Married | 67.1% | 46.0% | 48.0% |
| Married but Separated | 0.2% | 2.0% | 1.8% |
| Single Population | 32.7% | 52.1% | 50.2% |
| Never Married | 21.5% | 42.5% | 33.8% |
| Divorced | 2.3% | 7.0% | 10.8% |
| Widowed | 8.9% | 2.5% | 5.6% |
| space5 | | | |
| Household Size | 2.63 | 1.80 | 2.60 |
| Households | 546 | 5,202 | 124,010,992 |
| Family Households | 454 | 1,954 | 80,755,759 |
| Married couple, w/children | 21.1% | 29.0% | 30.5% |
| Married couple, no children | 66.5% | 58.7% | 42.9% |
| Non Family Households | 92 | 3,248 | 43,255,233 |
| Single householder, w/children | 4.4% | 9.4% | 15.8% |
| Single householder, no children | 7.9% | 3.0% | 10.8% |