| | Castleton-on-Hudson, NY | Hudson Falls, NY | United States |
| Population | 1,445 | 7,413 | 329,725,481 |
| Female Population | 57.3% | 50.6% | 50.5% |
| Male Population | 42.7% | 49.4% | 49.5% |
| Median Age | 41.7 | 41.7 | 38.4 |
| space3 | | | |
| Population - 2010 | 1,475 | 7,302 | 309,327,143 |
| Population - 2000 | 1,619 | 6,927 | 285,036,114 |
| Population - 1990 | 1,491 | 7,651 | 251,960,433 |
| Pop. 2000 to Now | -10.4% | 0.9% | 15.6% |
| Pop. 1990 to Now | -2.7% | -8.7% | 30.8% |
| space4 | | | |
| Population Density | 2,023.8 | 3,979.1 | 93.4 |
| Land Area | 0.7 | 1.9 | 3,531,905.4 |
| Water Area | 0.0 | 0.1 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Castleton-on-Hudson, NY | Hudson Falls, NY | United States |
| Age 0 to 4 | 4.1% | 3.1% | 5.9% |
| Age 5 to 9 | 8.8% | 6.7% | 6.1% |
| Age 10 to 14 | 5.7% | 6.1% | 6.6% |
| Age 15 to 17 | 1.6% | 1.5% | 3.9% |
| Age 18 to 20 | 2.7% | 1.7% | 4.0% |
| Age 21 to 24 | 3.5% | 4.3% | 5.2% |
| Age 25 to 34 | 14.3% | 15.6% | 13.8% |
| Age 35 to 44 | 13.0% | 13.3% | 12.9% |
| Age 45 to 54 | 12.7% | 10.1% | 12.6% |
| Age 55 to 59 | 10.2% | 9.1% | 6.7% |
| Age 60 to 64 | 6.2% | 7.7% | 6.3% |
| Age 65 to 74 | 8.6% | 13.0% | 9.6% |
| Age 75 to 84 | 3.3% | 4.4% | 4.5% |
| Age 85 and over | 5.5% | 3.3% | 1.9% |
| space1 | | | |
| Race | | | |
| | Castleton-on-Hudson, NY | Hudson Falls, NY | United States |
| White | 92.5% | 95.3% | 59.4% |
| Black | 0.1% | 1.1% | 12.2% |
| Asian | 0.0% | 0.4% | 5.6% |
| Native American | 0.1% | 0.3% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.2% | 0.4% |
| Two or More Races | 1.5% | 1.7% | 3.2% |
| Hispanic | 5.7% | 1.1% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Castleton-on-Hudson, NY | Hudson Falls, NY | United States |
| Married Population | 44.2% | 35.9% | 49.8% |
| Currently Married | 42.9% | 33.0% | 48.0% |
| Married but Separated | 1.3% | 2.9% | 1.8% |
| Single Population | 55.8% | 64.1% | 50.2% |
| Never Married | 32.4% | 33.0% | 33.8% |
| Divorced | 13.7% | 24.5% | 10.8% |
| Widowed | 9.8% | 6.6% | 5.6% |
| space5 | | | |
| Household Size | 2.19 | 2.08 | 2.60 |
| Households | 620 | 3,531 | 124,010,992 |
| Family Households | 373 | 1,579 | 80,755,759 |
| Married couple, w/children | 29.8% | 20.6% | 30.5% |
| Married couple, no children | 32.7% | 37.9% | 42.9% |
| Non Family Households | 247 | 1,952 | 43,255,233 |
| Single householder, w/children | 18.0% | 26.1% | 15.8% |
| Single householder, no children | 19.6% | 15.3% | 10.8% |