| | Middleburgh, NY | Blenheim, NY | United States |
| Population | 3,180 | 341 | 329,725,481 |
| Female Population | 47.5% | 54.3% | 50.5% |
| Male Population | 52.6% | 45.8% | 49.5% |
| Median Age | 52.2 | 46.3 | 38.4 |
| space3 | | | |
| Population - 2010 | 3,731 | 382 | 309,327,143 |
| Population - 2000 | 3,515 | 330 | 285,036,114 |
| Population - 1990 | 3,296 | 332 | 251,960,433 |
| Pop. 2000 to Now | 0.8% | 11.5% | 15.6% |
| Pop. 1990 to Now | 7.5% | 10.8% | 30.8% |
| space4 | | | |
| Population Density | 64.8 | 10.1 | 93.4 |
| Land Area | 49.1 | 33.9 | 3,531,905.4 |
| Water Area | 0.1 | 0.5 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Middleburgh, NY | Blenheim, NY | United States |
| Age 0 to 4 | 1.4% | 3.8% | 5.9% |
| Age 5 to 9 | 4.1% | 7.0% | 6.1% |
| Age 10 to 14 | 7.0% | 5.0% | 6.6% |
| Age 15 to 17 | 2.4% | 4.1% | 3.9% |
| Age 18 to 20 | 5.2% | 4.1% | 4.0% |
| Age 21 to 24 | 2.7% | 1.5% | 5.2% |
| Age 25 to 34 | 9.1% | 18.8% | 13.8% |
| Age 35 to 44 | 9.5% | 3.2% | 12.9% |
| Age 45 to 54 | 15.3% | 17.9% | 12.6% |
| Age 55 to 59 | 8.3% | 4.1% | 6.7% |
| Age 60 to 64 | 5.6% | 3.8% | 6.3% |
| Age 65 to 74 | 15.8% | 16.7% | 9.6% |
| Age 75 to 84 | 9.8% | 6.2% | 4.5% |
| Age 85 and over | 3.9% | 3.8% | 1.9% |
| space1 | | | |
| Race | | | |
| | Middleburgh, NY | Blenheim, NY | United States |
| White | 93.6% | 95.6% | 59.4% |
| Black | 0.8% | 0.0% | 12.2% |
| Asian | 1.1% | 0.9% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.1% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 2.2% | 1.8% | 3.2% |
| Hispanic | 2.0% | 1.8% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Middleburgh, NY | Blenheim, NY | United States |
| Married Population | 48.1% | 51.2% | 49.8% |
| Currently Married | 45.6% | 48.4% | 48.0% |
| Married but Separated | 2.5% | 2.8% | 1.8% |
| Single Population | 51.9% | 48.8% | 50.2% |
| Never Married | 33.1% | 27.5% | 33.8% |
| Divorced | 13.8% | 11.2% | 10.8% |
| Widowed | 5.0% | 10.1% | 5.6% |
| space5 | | | |
| Household Size | 2.14 | 2.38 | 2.60 |
| Households | 1,476 | 143 | 124,010,992 |
| Family Households | 857 | 98 | 80,755,759 |
| Married couple, w/children | 16.9% | 15.3% | 30.5% |
| Married couple, no children | 52.5% | 52.0% | 42.9% |
| Non Family Households | 619 | 45 | 43,255,233 |
| Single householder, w/children | 16.3% | 26.5% | 15.8% |
| Single householder, no children | 14.2% | 6.1% | 10.8% |