| | Delaware, NY | Patchogue, NY | United States |
| Population | 2,248 | 12,341 | 329,725,481 |
| Female Population | 51.6% | 52.2% | 50.5% |
| Male Population | 48.4% | 47.8% | 49.5% |
| Median Age | 48.8 | 37.6 | 38.4 |
| space3 | | | |
| Population - 2010 | 2,661 | 11,848 | 309,327,143 |
| Population - 2000 | 2,719 | 11,919 | 285,036,114 |
| Population - 1990 | 2,633 | 11,060 | 251,960,433 |
| Pop. 2000 to Now | -5.6% | 3.3% | 15.6% |
| Pop. 1990 to Now | -2.5% | 11.3% | 30.8% |
| space4 | | | |
| Population Density | 64.4 | 5,460.6 | 93.4 |
| Land Area | 34.9 | 2.3 | 3,531,905.4 |
| Water Area | 0.7 | 0.3 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Delaware, NY | Patchogue, NY | United States |
| Age 0 to 4 | 3.0% | 7.1% | 5.9% |
| Age 5 to 9 | 3.7% | 4.3% | 6.1% |
| Age 10 to 14 | 3.8% | 3.8% | 6.6% |
| Age 15 to 17 | 5.7% | 2.6% | 3.9% |
| Age 18 to 20 | 5.6% | 3.1% | 4.0% |
| Age 21 to 24 | 2.1% | 2.5% | 5.2% |
| Age 25 to 34 | 11.1% | 21.6% | 13.8% |
| Age 35 to 44 | 10.1% | 18.7% | 12.9% |
| Age 45 to 54 | 13.6% | 13.7% | 12.6% |
| Age 55 to 59 | 10.8% | 6.4% | 6.7% |
| Age 60 to 64 | 10.1% | 6.3% | 6.3% |
| Age 65 to 74 | 15.1% | 5.9% | 9.6% |
| Age 75 to 84 | 3.6% | 2.7% | 4.5% |
| Age 85 and over | 1.6% | 1.4% | 1.9% |
| space1 | | | |
| Race | | | |
| | Delaware, NY | Patchogue, NY | United States |
| White | 75.5% | 65.2% | 59.4% |
| Black | 11.6% | 3.8% | 12.2% |
| Asian | 0.4% | 6.0% | 5.6% |
| Native American | 0.3% | 0.2% | 0.6% |
| Hawaiian, Pacific Islander | 0.2% | 0.0% | 0.2% |
| Other | 0.2% | 0.3% | 0.4% |
| Two or More Races | 4.1% | 5.3% | 3.2% |
| Hispanic | 7.7% | 19.2% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Delaware, NY | Patchogue, NY | United States |
| Married Population | 40.3% | 44.8% | 49.8% |
| Currently Married | 37.0% | 43.4% | 48.0% |
| Married but Separated | 3.4% | 1.5% | 1.8% |
| Single Population | 59.7% | 55.2% | 50.2% |
| Never Married | 40.1% | 39.9% | 33.8% |
| Divorced | 13.7% | 10.3% | 10.8% |
| Widowed | 5.8% | 5.0% | 5.6% |
| space5 | | | |
| Household Size | 2.10 | 2.38 | 2.60 |
| Households | 984 | 5,159 | 124,010,992 |
| Family Households | 515 | 2,985 | 80,755,759 |
| Married couple, w/children | 26.2% | 26.5% | 30.5% |
| Married couple, no children | 35.5% | 46.4% | 42.9% |
| Non Family Households | 469 | 2,174 | 43,255,233 |
| Single householder, w/children | 7.2% | 15.5% | 15.8% |
| Single householder, no children | 31.1% | 11.5% | 10.8% |