| | Plaistow, NH | Atkinson, NH | United States |
| Population | 7,812 | 7,086 | 329,725,481 |
| Female Population | 51.5% | 47.1% | 50.5% |
| Male Population | 48.6% | 52.9% | 49.5% |
| Median Age | 44.3 | 52.4 | 38.4 |
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| Population - 2010 | 7,602 | 6,767 | 309,327,143 |
| Population - 2000 | 7,747 | 6,178 | 285,036,114 |
| Population - 1990 | 7,316 | 5,188 | 251,960,433 |
| Pop. 2000 to Now | -0.2% | 15.9% | 15.6% |
| Pop. 1990 to Now | 5.7% | 38.1% | 30.8% |
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| Population Density | 735.0 | 635.7 | 93.4 |
| Land Area | 10.6 | 11.1 | 3,531,905.4 |
| Water Area | 0.0 | 0.2 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Plaistow, NH | Atkinson, NH | United States |
| Age 0 to 4 | 4.7% | 3.9% | 5.9% |
| Age 5 to 9 | 5.2% | 2.6% | 6.1% |
| Age 10 to 14 | 7.7% | 4.9% | 6.6% |
| Age 15 to 17 | 2.4% | 3.8% | 3.9% |
| Age 18 to 20 | 3.0% | 5.1% | 4.0% |
| Age 21 to 24 | 4.7% | 4.8% | 5.2% |
| Age 25 to 34 | 10.4% | 8.5% | 13.8% |
| Age 35 to 44 | 12.6% | 6.4% | 12.9% |
| Age 45 to 54 | 17.2% | 16.5% | 12.6% |
| Age 55 to 59 | 8.2% | 8.3% | 6.7% |
| Age 60 to 64 | 6.7% | 13.4% | 6.3% |
| Age 65 to 74 | 11.2% | 15.3% | 9.6% |
| Age 75 to 84 | 3.1% | 5.0% | 4.5% |
| Age 85 and over | 2.9% | 1.4% | 1.9% |
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| Race | | | |
| | Plaistow, NH | Atkinson, NH | United States |
| White | 86.3% | 95.9% | 59.4% |
| Black | 0.1% | 0.0% | 12.2% |
| Asian | 0.0% | 1.7% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 1.1% | 0.0% | 0.4% |
| Two or More Races | 4.0% | 0.9% | 3.2% |
| Hispanic | 8.4% | 1.5% | 18.4% |
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| Marriage & Family | | | |
| | Plaistow, NH | Atkinson, NH | United States |
| Married Population | 51.8% | 63.9% | 49.8% |
| Currently Married | 48.5% | 63.6% | 48.0% |
| Married but Separated | 3.3% | 0.3% | 1.8% |
| Single Population | 48.2% | 36.1% | 50.2% |
| Never Married | 28.3% | 21.8% | 33.8% |
| Divorced | 13.2% | 9.7% | 10.8% |
| Widowed | 6.7% | 4.6% | 5.6% |
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| Household Size | 2.41 | 2.51 | 2.60 |
| Households | 3,242 | 2,821 | 124,010,992 |
| Family Households | 2,058 | 2,051 | 80,755,759 |
| Married couple, w/children | 27.0% | 26.7% | 30.5% |
| Married couple, no children | 47.9% | 67.3% | 42.9% |
| Non Family Households | 1,184 | 770 | 43,255,233 |
| Single householder, w/children | 19.0% | 3.0% | 15.8% |
| Single householder, no children | 6.1% | 3.0% | 10.8% |