| | Ayer, MA | Wading River, NY | United States |
| Population | 8,396 | 8,304 | 329,725,481 |
| Female Population | 50.7% | 48.3% | 50.5% |
| Male Population | 49.3% | 51.7% | 49.5% |
| Median Age | 41 | 43.6 | 38.4 |
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| Population - 2010 | 7,465 | 8,157 | 309,327,143 |
| Population - 2000 | 7,287 | 6,668 | 285,036,114 |
| Population - 1990 | 6,871 | 5,317 | 251,960,433 |
| Pop. 2000 to Now | 12.7% | 24.0% | 15.6% |
| Pop. 1990 to Now | 19.5% | 55.5% | 30.8% |
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| Population Density | 941.6 | 849.0 | 93.4 |
| Land Area | 8.9 | 9.8 | 3,531,905.4 |
| Water Area | 0.6 | 0.0 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Ayer, MA | Wading River, NY | United States |
| Age 0 to 4 | 6.1% | 4.2% | 5.9% |
| Age 5 to 9 | 5.7% | 5.8% | 6.1% |
| Age 10 to 14 | 3.9% | 6.5% | 6.6% |
| Age 15 to 17 | 4.6% | 4.4% | 3.9% |
| Age 18 to 20 | 2.5% | 2.9% | 4.0% |
| Age 21 to 24 | 6.0% | 4.1% | 5.2% |
| Age 25 to 34 | 12.1% | 10.7% | 13.8% |
| Age 35 to 44 | 15.0% | 12.5% | 12.9% |
| Age 45 to 54 | 10.2% | 10.9% | 12.6% |
| Age 55 to 59 | 10.1% | 11.5% | 6.7% |
| Age 60 to 64 | 9.1% | 8.0% | 6.3% |
| Age 65 to 74 | 9.1% | 14.6% | 9.6% |
| Age 75 to 84 | 3.6% | 2.6% | 4.5% |
| Age 85 and over | 2.0% | 1.3% | 1.9% |
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| Race | | | |
| | Ayer, MA | Wading River, NY | United States |
| White | 78.6% | 88.5% | 59.4% |
| Black | 2.5% | 4.4% | 12.2% |
| Asian | 4.9% | 1.0% | 5.6% |
| Native American | 0.1% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 4.1% | 0.0% | 3.2% |
| Hispanic | 9.9% | 6.2% | 18.4% |
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| Marriage & Family | | | |
| | Ayer, MA | Wading River, NY | United States |
| Married Population | 48.2% | 59.0% | 49.8% |
| Currently Married | 46.7% | 57.6% | 48.0% |
| Married but Separated | 1.5% | 1.4% | 1.8% |
| Single Population | 51.8% | 41.0% | 50.2% |
| Never Married | 38.8% | 25.3% | 33.8% |
| Divorced | 9.4% | 12.5% | 10.8% |
| Widowed | 3.6% | 3.3% | 5.6% |
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| Household Size | 2.25 | 2.56 | 2.60 |
| Households | 3,694 | 3,183 | 124,010,992 |
| Family Households | 2,071 | 2,257 | 80,755,759 |
| Married couple, w/children | 33.2% | 29.2% | 30.5% |
| Married couple, no children | 41.9% | 54.5% | 42.9% |
| Non Family Households | 1,623 | 926 | 43,255,233 |
| Single householder, w/children | 16.3% | 9.4% | 15.8% |
| Single householder, no children | 8.6% | 6.9% | 10.8% |