| | Hopewell township, NJ | Naples, ME | United States |
| Population | 17,554 | 3,911 | 329,725,481 |
| Female Population | 50.0% | 42.7% | 50.5% |
| Male Population | 50.0% | 57.3% | 49.5% |
| Median Age | 43.6 | 48.2 | 38.4 |
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| Population - 2010 | 18,350 | 3,875 | 309,327,143 |
| Population - 2000 | 16,105 | 3,274 | 285,036,114 |
| Population - 1990 | 11,590 | 2,860 | 251,960,433 |
| Pop. 2000 to Now | 9.7% | 22.1% | 15.6% |
| Pop. 1990 to Now | 52.5% | 39.8% | 30.8% |
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| Population Density | 302.5 | 122.9 | 93.4 |
| Land Area | 58.0 | 31.8 | 3,531,905.4 |
| Water Area | 0.9 | 5.4 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Hopewell township, NJ | Naples, ME | United States |
| Age 0 to 4 | 5.5% | 5.8% | 5.9% |
| Age 5 to 9 | 6.6% | 4.4% | 6.1% |
| Age 10 to 14 | 6.0% | 6.2% | 6.6% |
| Age 15 to 17 | 5.3% | 1.2% | 3.9% |
| Age 18 to 20 | 3.4% | 0.0% | 4.0% |
| Age 21 to 24 | 5.3% | 4.0% | 5.2% |
| Age 25 to 34 | 6.0% | 13.9% | 13.8% |
| Age 35 to 44 | 14.3% | 9.2% | 12.9% |
| Age 45 to 54 | 14.0% | 15.2% | 12.6% |
| Age 55 to 59 | 9.6% | 8.9% | 6.7% |
| Age 60 to 64 | 8.4% | 8.8% | 6.3% |
| Age 65 to 74 | 8.6% | 16.2% | 9.6% |
| Age 75 to 84 | 5.1% | 4.6% | 4.5% |
| Age 85 and over | 1.8% | 1.6% | 1.9% |
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| Race | | | |
| | Hopewell township, NJ | Naples, ME | United States |
| White | 77.0% | 92.0% | 59.4% |
| Black | 2.9% | 0.0% | 12.2% |
| Asian | 12.2% | 0.0% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 1.1% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 3.3% | 6.0% | 3.2% |
| Hispanic | 4.6% | 0.8% | 18.4% |
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| Marriage & Family | | | |
| | Hopewell township, NJ | Naples, ME | United States |
| Married Population | 61.2% | 44.7% | 49.8% |
| Currently Married | 61.0% | 44.7% | 48.0% |
| Married but Separated | 0.3% | 0.0% | 1.8% |
| Single Population | 38.8% | 55.3% | 50.2% |
| Never Married | 28.7% | 28.9% | 33.8% |
| Divorced | 6.7% | 20.1% | 10.8% |
| Widowed | 3.4% | 6.2% | 5.6% |
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| Household Size | 2.90 | 1.94 | 2.60 |
| Households | 5,887 | 2,006 | 124,010,992 |
| Family Households | 4,499 | 955 | 80,755,759 |
| Married couple, w/children | 41.8% | 19.8% | 30.5% |
| Married couple, no children | 49.7% | 52.7% | 42.9% |
| Non Family Households | 1,388 | 1,051 | 43,255,233 |
| Single householder, w/children | 2.5% | 19.2% | 15.8% |
| Single householder, no children | 6.0% | 8.4% | 10.8% |