| | Peapack and Gladstone, NJ | Greenville, DE | United States |
| Population | 2,611 | 2,763 | 329,725,481 |
| Female Population | 56.0% | 52.2% | 50.5% |
| Male Population | 44.0% | 47.8% | 49.5% |
| Median Age | 42.2 | 40 | 38.4 |
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| Population - 2010 | 2,569 | 2,453 | 309,327,143 |
| Population - 2000 | 2,433 | 2,332 | 285,036,114 |
| Population - 1990 | 2,111 | 2,484 | 251,960,433 |
| Pop. 2000 to Now | 6.6% | 0.2% | 15.6% |
| Pop. 1990 to Now | 22.8% | -5.9% | 30.8% |
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| Population Density | 456.4 | 1,006.6 | 93.4 |
| Land Area | 5.7 | 2.7 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Peapack and Gladstone, NJ | Greenville, DE | United States |
| Age 0 to 4 | 8.1% | 6.9% | 5.9% |
| Age 5 to 9 | 4.7% | 6.3% | 6.1% |
| Age 10 to 14 | 9.8% | 5.7% | 6.6% |
| Age 15 to 17 | 5.9% | 3.5% | 3.9% |
| Age 18 to 20 | 4.4% | 0.6% | 4.0% |
| Age 21 to 24 | 5.5% | 1.3% | 5.2% |
| Age 25 to 34 | 6.1% | 18.4% | 13.8% |
| Age 35 to 44 | 7.8% | 10.0% | 12.9% |
| Age 45 to 54 | 10.8% | 14.8% | 12.6% |
| Age 55 to 59 | 10.8% | 6.7% | 6.7% |
| Age 60 to 64 | 8.7% | 4.5% | 6.3% |
| Age 65 to 74 | 10.0% | 12.0% | 9.6% |
| Age 75 to 84 | 5.9% | 7.0% | 4.5% |
| Age 85 and over | 1.3% | 2.4% | 1.9% |
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| Race | | | |
| | Peapack and Gladstone, NJ | Greenville, DE | United States |
| White | 79.9% | 77.5% | 59.4% |
| Black | 4.5% | 4.6% | 12.2% |
| Asian | 3.2% | 14.2% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.4% | 0.4% |
| Two or More Races | 2.4% | 1.9% | 3.2% |
| Hispanic | 10.1% | 1.3% | 18.4% |
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| Marriage & Family | | | |
| | Peapack and Gladstone, NJ | Greenville, DE | United States |
| Married Population | 59.3% | 58.3% | 49.8% |
| Currently Married | 57.0% | 56.2% | 48.0% |
| Married but Separated | 2.3% | 2.1% | 1.8% |
| Single Population | 40.7% | 41.7% | 50.2% |
| Never Married | 26.7% | 27.4% | 33.8% |
| Divorced | 9.5% | 10.2% | 10.8% |
| Widowed | 4.4% | 4.2% | 5.6% |
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| Household Size | 2.84 | 2.22 | 2.60 |
| Households | 797 | 1,241 | 124,010,992 |
| Family Households | 671 | 716 | 80,755,759 |
| Married couple, w/children | 31.3% | 39.0% | 30.5% |
| Married couple, no children | 47.4% | 46.2% | 42.9% |
| Non Family Households | 126 | 525 | 43,255,233 |
| Single householder, w/children | 7.9% | 8.7% | 15.8% |
| Single householder, no children | 13.4% | 6.1% | 10.8% |