| | Rolling Hills Estates, CA | Long Grove, IL | United States |
| Population | 8,305 | 8,258 | 329,725,481 |
| Female Population | 48.9% | 49.8% | 50.5% |
| Male Population | 51.1% | 50.2% | 49.5% |
| Median Age | 48.1 | 47.1 | 38.4 |
| space3 | | | |
| Population - 2010 | 8,066 | 7,932 | 309,327,143 |
| Population - 2000 | 7,676 | 6,735 | 285,036,114 |
| Population - 1990 | 7,789 | 4,740 | 251,960,433 |
| Pop. 2000 to Now | 3.6% | 16.8% | 15.6% |
| Pop. 1990 to Now | 2.1% | 66.0% | 30.8% |
| space4 | | | |
| Population Density | 2,326.3 | 668.7 | 93.4 |
| Land Area | 3.6 | 12.3 | 3,531,905.4 |
| Water Area | 0.0 | 0.2 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Rolling Hills Estates, CA | Long Grove, IL | United States |
| Age 0 to 4 | 3.7% | 3.3% | 5.9% |
| Age 5 to 9 | 7.6% | 6.9% | 6.1% |
| Age 10 to 14 | 6.0% | 7.3% | 6.6% |
| Age 15 to 17 | 4.3% | 3.5% | 3.9% |
| Age 18 to 20 | 6.1% | 4.3% | 4.0% |
| Age 21 to 24 | 1.5% | 4.9% | 5.2% |
| Age 25 to 34 | 5.6% | 7.4% | 13.8% |
| Age 35 to 44 | 10.3% | 9.5% | 12.9% |
| Age 45 to 54 | 15.8% | 13.4% | 12.6% |
| Age 55 to 59 | 7.3% | 10.3% | 6.7% |
| Age 60 to 64 | 7.4% | 12.2% | 6.3% |
| Age 65 to 74 | 9.8% | 10.9% | 9.6% |
| Age 75 to 84 | 9.5% | 4.3% | 4.5% |
| Age 85 and over | 5.2% | 1.8% | 1.9% |
| space1 | | | |
| Race | | | |
| | Rolling Hills Estates, CA | Long Grove, IL | United States |
| White | 61.3% | 73.6% | 59.4% |
| Black | 2.0% | 1.1% | 12.2% |
| Asian | 25.4% | 15.3% | 5.6% |
| Native American | 0.1% | 0.2% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.2% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 5.2% | 3.8% | 3.2% |
| Hispanic | 6.1% | 5.8% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Rolling Hills Estates, CA | Long Grove, IL | United States |
| Married Population | 64.3% | 70.4% | 49.8% |
| Currently Married | 63.8% | 70.4% | 48.0% |
| Married but Separated | 0.5% | 0.0% | 1.8% |
| Single Population | 35.7% | 29.6% | 50.2% |
| Never Married | 25.4% | 21.5% | 33.8% |
| Divorced | 5.1% | 4.9% | 10.8% |
| Widowed | 5.2% | 3.2% | 5.6% |
| space5 | | | |
| Household Size | 3.01 | 3.24 | 2.60 |
| Households | 2,758 | 2,449 | 124,010,992 |
| Family Households | 2,283 | 2,335 | 80,755,759 |
| Married couple, w/children | 35.1% | 32.1% | 30.5% |
| Married couple, no children | 51.1% | 62.1% | 42.9% |
| Non Family Households | 475 | 114 | 43,255,233 |
| Single householder, w/children | 2.8% | 2.1% | 15.8% |
| Single householder, no children | 11.0% | 3.6% | 10.8% |