| | Long Valley, NJ | Randolph, NJ | United States |
| Population | 2,108 | 26,433 | 329,725,481 |
| Female Population | 48.1% | 49.2% | 50.5% |
| Male Population | 51.9% | 50.8% | 49.5% |
| Median Age | 44.9 | 40.1 | 38.4 |
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| Population - 2010 | 1,885 | 25,714 | 309,327,143 |
| Population - 2000 | 1,818 | 24,847 | 285,036,114 |
| Population - 1990 | 1,744 | 19,974 | 251,960,433 |
| Pop. 2000 to Now | 10.6% | 1.7% | 15.6% |
| Pop. 1990 to Now | 15.3% | 26.5% | 30.8% |
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| Population Density | 461.7 | 1,270.8 | 93.4 |
| Land Area | 4.6 | 20.8 | 3,531,905.4 |
| Water Area | 0.1 | 0.2 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Long Valley, NJ | Randolph, NJ | United States |
| Age 0 to 4 | 7.6% | 5.5% | 5.9% |
| Age 5 to 9 | 3.2% | 8.1% | 6.1% |
| Age 10 to 14 | 3.7% | 6.1% | 6.6% |
| Age 15 to 17 | 14.4% | 5.4% | 3.9% |
| Age 18 to 20 | 1.9% | 4.8% | 4.0% |
| Age 21 to 24 | 6.9% | 3.4% | 5.2% |
| Age 25 to 34 | 7.4% | 10.4% | 13.8% |
| Age 35 to 44 | 5.0% | 14.9% | 12.9% |
| Age 45 to 54 | 13.6% | 14.3% | 12.6% |
| Age 55 to 59 | 9.3% | 8.5% | 6.7% |
| Age 60 to 64 | 5.0% | 6.0% | 6.3% |
| Age 65 to 74 | 15.9% | 8.5% | 9.6% |
| Age 75 to 84 | 6.1% | 2.9% | 4.5% |
| Age 85 and over | 0.0% | 1.3% | 1.9% |
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| Race | | | |
| | Long Valley, NJ | Randolph, NJ | United States |
| White | 70.5% | 69.2% | 59.4% |
| Black | 0.0% | 3.4% | 12.2% |
| Asian | 3.7% | 13.3% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.8% | 0.4% |
| Two or More Races | 4.6% | 1.7% | 3.2% |
| Hispanic | 21.1% | 11.6% | 18.4% |
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| Marriage & Family | | | |
| | Long Valley, NJ | Randolph, NJ | United States |
| Married Population | 55.5% | 62.8% | 49.8% |
| Currently Married | 55.5% | 62.1% | 48.0% |
| Married but Separated | 0.0% | 0.7% | 1.8% |
| Single Population | 44.5% | 37.2% | 50.2% |
| Never Married | 31.0% | 26.6% | 33.8% |
| Divorced | 9.6% | 6.7% | 10.8% |
| Widowed | 3.9% | 3.8% | 5.6% |
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| Household Size | 2.80 | 2.89 | 2.60 |
| Households | 748 | 9,113 | 124,010,992 |
| Family Households | 628 | 7,266 | 80,755,759 |
| Married couple, w/children | 31.1% | 46.2% | 30.5% |
| Married couple, no children | 48.4% | 41.0% | 42.9% |
| Non Family Households | 120 | 1,847 | 43,255,233 |
| Single householder, w/children | 14.3% | 7.2% | 15.8% |
| Single householder, no children | 6.2% | 5.6% | 10.8% |