| | Cornwall-on-Hudson, NY | Newburgh, NY | United States |
| Population | 3,059 | 28,834 | 329,725,481 |
| Female Population | 52.6% | 50.9% | 50.5% |
| Male Population | 47.4% | 49.1% | 49.5% |
| Median Age | 45.2 | 31.3 | 38.4 |
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| Population - 2010 | 2,985 | 28,935 | 309,327,143 |
| Population - 2000 | 3,058 | 28,259 | 285,036,114 |
| Population - 1990 | 3,093 | 26,454 | 251,960,433 |
| Pop. 2000 to Now | -5.3% | -1.3% | 15.6% |
| Pop. 1990 to Now | -6.4% | 5.5% | 30.8% |
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| Population Density | 1,539.5 | 7,575.9 | 93.4 |
| Land Area | 2.0 | 3.8 | 3,531,905.4 |
| Water Area | 0.1 | 1.0 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Cornwall-on-Hudson, NY | Newburgh, NY | United States |
| Age 0 to 4 | 2.4% | 6.7% | 5.9% |
| Age 5 to 9 | 5.2% | 8.3% | 6.1% |
| Age 10 to 14 | 7.1% | 7.7% | 6.6% |
| Age 15 to 17 | 4.5% | 4.2% | 3.9% |
| Age 18 to 20 | 3.7% | 4.8% | 4.0% |
| Age 21 to 24 | 6.8% | 6.6% | 5.2% |
| Age 25 to 34 | 5.6% | 15.9% | 13.8% |
| Age 35 to 44 | 14.2% | 12.4% | 12.9% |
| Age 45 to 54 | 16.8% | 12.9% | 12.6% |
| Age 55 to 59 | 9.1% | 4.5% | 6.7% |
| Age 60 to 64 | 5.7% | 4.3% | 6.3% |
| Age 65 to 74 | 9.8% | 7.2% | 9.6% |
| Age 75 to 84 | 5.3% | 3.3% | 4.5% |
| Age 85 and over | 4.0% | 1.2% | 1.9% |
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| Race | | | |
| | Cornwall-on-Hudson, NY | Newburgh, NY | United States |
| White | 86.0% | 19.2% | 59.4% |
| Black | 0.9% | 21.5% | 12.2% |
| Asian | 2.6% | 0.9% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.7% | 0.4% |
| Two or More Races | 0.9% | 2.4% | 3.2% |
| Hispanic | 9.7% | 55.3% | 18.4% |
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| Marriage & Family | | | |
| | Cornwall-on-Hudson, NY | Newburgh, NY | United States |
| Married Population | 54.9% | 36.2% | 49.8% |
| Currently Married | 53.9% | 32.4% | 48.0% |
| Married but Separated | 1.0% | 3.8% | 1.8% |
| Single Population | 45.1% | 63.8% | 50.2% |
| Never Married | 29.5% | 46.7% | 33.8% |
| Divorced | 11.9% | 10.3% | 10.8% |
| Widowed | 3.7% | 6.8% | 5.6% |
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| Household Size | 2.51 | 2.81 | 2.60 |
| Households | 1,186 | 9,951 | 124,010,992 |
| Family Households | 841 | 5,954 | 80,755,759 |
| Married couple, w/children | 30.6% | 25.4% | 30.5% |
| Married couple, no children | 49.2% | 26.0% | 42.9% |
| Non Family Households | 345 | 3,997 | 43,255,233 |
| Single householder, w/children | 11.7% | 34.7% | 15.8% |
| Single householder, no children | 8.6% | 13.9% | 10.8% |