| | Orchard Park, NY | West Seneca, NY | United States |
| Population | 29,668 | 45,390 | 329,725,481 |
| Female Population | 50.5% | 52.2% | 50.5% |
| Male Population | 49.5% | 47.8% | 49.5% |
| Median Age | 47 | 45.3 | 38.4 |
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| Population - 2010 | 29,067 | 44,719 | 309,327,143 |
| Population - 2000 | 27,637 | 45,943 | 285,036,114 |
| Population - 1990 | 24,632 | 47,866 | 251,960,433 |
| Pop. 2000 to Now | 7.5% | -1.7% | 15.6% |
| Pop. 1990 to Now | 20.6% | -5.7% | 30.8% |
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| Population Density | 771.9 | 2,122.3 | 93.4 |
| Land Area | 38.4 | 21.4 | 3,531,905.4 |
| Water Area | 0.1 | 0.1 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Orchard Park, NY | West Seneca, NY | United States |
| Age 0 to 4 | 4.8% | 4.6% | 5.9% |
| Age 5 to 9 | 6.9% | 4.5% | 6.1% |
| Age 10 to 14 | 6.0% | 4.8% | 6.6% |
| Age 15 to 17 | 3.3% | 4.2% | 3.9% |
| Age 18 to 20 | 2.6% | 3.1% | 4.0% |
| Age 21 to 24 | 4.1% | 4.6% | 5.2% |
| Age 25 to 34 | 9.2% | 13.8% | 13.8% |
| Age 35 to 44 | 11.9% | 10.1% | 12.9% |
| Age 45 to 54 | 12.7% | 14.5% | 12.6% |
| Age 55 to 59 | 7.8% | 8.3% | 6.7% |
| Age 60 to 64 | 7.5% | 7.1% | 6.3% |
| Age 65 to 74 | 12.6% | 11.5% | 9.6% |
| Age 75 to 84 | 7.4% | 6.3% | 4.5% |
| Age 85 and over | 3.3% | 2.6% | 1.9% |
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| Race | | | |
| | Orchard Park, NY | West Seneca, NY | United States |
| White | 91.8% | 93.9% | 59.4% |
| Black | 1.5% | 1.5% | 12.2% |
| Asian | 0.6% | 0.3% | 5.6% |
| Native American | 0.2% | 0.1% | 0.6% |
| Hawaiian, Pacific Islander | 0.1% | 0.1% | 0.2% |
| Other | 1.6% | 0.0% | 0.4% |
| Two or More Races | 0.9% | 1.2% | 3.2% |
| Hispanic | 3.2% | 3.0% | 18.4% |
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| Marriage & Family | | | |
| | Orchard Park, NY | West Seneca, NY | United States |
| Married Population | 58.4% | 46.8% | 49.8% |
| Currently Married | 57.1% | 45.8% | 48.0% |
| Married but Separated | 1.2% | 1.1% | 1.8% |
| Single Population | 41.6% | 53.2% | 50.2% |
| Never Married | 25.2% | 35.3% | 33.8% |
| Divorced | 9.5% | 9.5% | 10.8% |
| Widowed | 7.0% | 8.4% | 5.6% |
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| Household Size | 2.40 | 2.26 | 2.60 |
| Households | 12,195 | 19,863 | 124,010,992 |
| Family Households | 8,051 | 11,783 | 80,755,759 |
| Married couple, w/children | 26.7% | 27.1% | 30.5% |
| Married couple, no children | 57.5% | 46.3% | 42.9% |
| Non Family Households | 4,144 | 8,080 | 43,255,233 |
| Single householder, w/children | 10.6% | 13.7% | 15.8% |
| Single householder, no children | 5.2% | 12.9% | 10.8% |