| | Rensselaer, NY | New Paltz, NY | United States |
| Population | 9,330 | 14,421 | 329,725,481 |
| Female Population | 50.5% | 54.4% | 50.5% |
| Male Population | 49.5% | 45.6% | 49.5% |
| Median Age | 37.3 | 26.2 | 38.4 |
| space3 | | | |
| Population - 2010 | 9,374 | 14,004 | 309,327,143 |
| Population - 2000 | 7,761 | 12,830 | 285,036,114 |
| Population - 1990 | 8,255 | 11,388 | 251,960,433 |
| Pop. 2000 to Now | 17.8% | 9.9% | 15.6% |
| Pop. 1990 to Now | 10.8% | 23.8% | 30.8% |
| space4 | | | |
| Population Density | 2,934.9 | 425.7 | 93.4 |
| Land Area | 3.2 | 33.9 | 3,531,905.4 |
| Water Area | 0.3 | 0.4 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Rensselaer, NY | New Paltz, NY | United States |
| Age 0 to 4 | 5.2% | 3.1% | 5.9% |
| Age 5 to 9 | 4.7% | 3.4% | 6.1% |
| Age 10 to 14 | 6.3% | 4.8% | 6.6% |
| Age 15 to 17 | 0.9% | 2.7% | 3.9% |
| Age 18 to 20 | 2.7% | 17.4% | 4.0% |
| Age 21 to 24 | 2.7% | 16.9% | 5.2% |
| Age 25 to 34 | 23.3% | 7.8% | 13.8% |
| Age 35 to 44 | 12.1% | 7.6% | 12.9% |
| Age 45 to 54 | 10.6% | 10.4% | 12.6% |
| Age 55 to 59 | 7.1% | 5.8% | 6.7% |
| Age 60 to 64 | 6.9% | 4.6% | 6.3% |
| Age 65 to 74 | 10.8% | 9.1% | 9.6% |
| Age 75 to 84 | 5.0% | 4.2% | 4.5% |
| Age 85 and over | 1.6% | 2.3% | 1.9% |
| space1 | | | |
| Race | | | |
| | Rensselaer, NY | New Paltz, NY | United States |
| White | 75.0% | 76.9% | 59.4% |
| Black | 5.2% | 4.8% | 12.2% |
| Asian | 6.8% | 3.6% | 5.6% |
| Native American | 0.3% | 0.2% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.3% | 0.9% | 0.4% |
| Two or More Races | 5.3% | 2.5% | 3.2% |
| Hispanic | 7.2% | 11.2% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Rensselaer, NY | New Paltz, NY | United States |
| Married Population | 39.8% | 31.2% | 49.8% |
| Currently Married | 37.3% | 29.9% | 48.0% |
| Married but Separated | 2.5% | 1.2% | 1.8% |
| Single Population | 60.2% | 68.8% | 50.2% |
| Never Married | 45.4% | 54.4% | 33.8% |
| Divorced | 9.6% | 9.2% | 10.8% |
| Widowed | 5.2% | 5.3% | 5.6% |
| space5 | | | |
| Household Size | 2.12 | 2.35 | 2.60 |
| Households | 4,390 | 4,868 | 124,010,992 |
| Family Households | 2,075 | 2,329 | 80,755,759 |
| Married couple, w/children | 20.0% | 28.1% | 30.5% |
| Married couple, no children | 41.9% | 46.3% | 42.9% |
| Non Family Households | 2,315 | 2,539 | 43,255,233 |
| Single householder, w/children | 18.6% | 19.7% | 15.8% |
| Single householder, no children | 19.6% | 6.0% | 10.8% |