| Statistic | Stonington | Connecticut | National |
| Population | 899 | 3,565,287 | 328,239,523 |
| Population density (sq mi) | 2,636 | 736 | 91 |
| Median age | 58.1 | 40.6 | 37.7 |
| Male/Female ratio | 0.9:1 | 1.0:1 | 1.0:1 |
| Married (15yrs & older) | 49% | 54% | 55% |
| Families w/ Kids under 18 | 19% | 43% | 43% |
| Speak English | 92% | 78% | 79% |
| Speak Spanish | 0% | 12% | 13% |
| Race | Stonington | Connecticut | National |
| White | 89.43% | 77.14% | 73.35% |
| Black | 1.11% | 10.39% | 12.63% |
| Asian | 1.56% | 4.26% | 5.22% |
| American Indian | 0.00% | 0.26% | 0.82% |
| Native Hawaiian | 0.00% | 0.03% | 0.18% |
| Mixed race | 7.90% | 2.98% | 3.06% |
| Other race | 0.00% | 4.95% | 4.75% |
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