| | Newington, NH | Stonington, CT | United States |
| Population | 1,007 | 18,354 | 329,725,481 |
| Female Population | 45.8% | 51.7% | 50.5% |
| Male Population | 54.2% | 48.3% | 49.5% |
| Median Age | 52.7 | 50.4 | 38.4 |
| space3 | | | |
| Population - 2010 | 753 | 18,524 | 309,327,143 |
| Population - 2000 | 775 | 17,906 | 285,036,114 |
| Population - 1990 | 990 | 16,919 | 251,960,433 |
| Pop. 2000 to Now | 7.1% | 3.7% | 15.6% |
| Pop. 1990 to Now | -16.2% | 9.7% | 30.8% |
| space4 | | | |
| Population Density | 122.9 | 474.8 | 93.4 |
| Land Area | 8.2 | 38.7 | 3,531,905.4 |
| Water Area | 4.3 | 11.4 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Newington, NH | Stonington, CT | United States |
| Age 0 to 4 | 1.9% | 5.1% | 5.9% |
| Age 5 to 9 | 8.0% | 5.0% | 6.1% |
| Age 10 to 14 | 2.5% | 4.6% | 6.6% |
| Age 15 to 17 | 0.8% | 3.3% | 3.9% |
| Age 18 to 20 | 0.5% | 2.7% | 4.0% |
| Age 21 to 24 | 3.5% | 2.5% | 5.2% |
| Age 25 to 34 | 5.8% | 9.0% | 13.8% |
| Age 35 to 44 | 8.4% | 11.3% | 12.9% |
| Age 45 to 54 | 21.5% | 13.8% | 12.6% |
| Age 55 to 59 | 12.2% | 9.3% | 6.7% |
| Age 60 to 64 | 9.1% | 7.6% | 6.3% |
| Age 65 to 74 | 13.6% | 15.0% | 9.6% |
| Age 75 to 84 | 6.6% | 7.7% | 4.5% |
| Age 85 and over | 5.6% | 3.0% | 1.9% |
| space1 | | | |
| Race | | | |
| | Newington, NH | Stonington, CT | United States |
| White | 90.5% | 84.0% | 59.4% |
| Black | 0.0% | 3.0% | 12.2% |
| Asian | 1.3% | 2.0% | 5.6% |
| Native American | 0.5% | 0.5% | 0.6% |
| Hawaiian, Pacific Islander | 0.1% | 0.0% | 0.2% |
| Other | 5.5% | 0.3% | 0.4% |
| Two or More Races | 1.9% | 6.8% | 3.2% |
| Hispanic | 0.3% | 3.5% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Newington, NH | Stonington, CT | United States |
| Married Population | 63.3% | 55.5% | 49.8% |
| Currently Married | 60.3% | 55.0% | 48.0% |
| Married but Separated | 2.9% | 0.5% | 1.8% |
| Single Population | 36.7% | 44.5% | 50.2% |
| Never Married | 18.1% | 24.8% | 33.8% |
| Divorced | 9.3% | 13.2% | 10.8% |
| Widowed | 9.3% | 6.4% | 5.6% |
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| Household Size | 2.51 | 2.17 | 2.60 |
| Households | 389 | 8,324 | 124,010,992 |
| Family Households | 294 | 5,385 | 80,755,759 |
| Married couple, w/children | 27.9% | 26.6% | 30.5% |
| Married couple, no children | 56.1% | 51.3% | 42.9% |
| Non Family Households | 95 | 2,939 | 43,255,233 |
| Single householder, w/children | 3.7% | 12.3% | 15.8% |
| Single householder, no children | 12.2% | 9.7% | 10.8% |