| | Stoddard, NH | Sullivan, NH | United States |
| Population | 1,111 | 650 | 329,725,481 |
| Female Population | 50.4% | 51.9% | 50.5% |
| Male Population | 49.6% | 48.2% | 49.5% |
| Median Age | 49.5 | 45.6 | 38.4 |
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| Population - 2010 | 1,233 | 676 | 309,327,143 |
| Population - 2000 | 928 | 746 | 285,036,114 |
| Population - 1990 | 622 | 706 | 251,960,433 |
| Pop. 2000 to Now | 35.1% | -9.7% | 15.6% |
| Pop. 1990 to Now | 101.6% | -4.5% | 30.8% |
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| Population Density | 21.8 | 35.1 | 93.4 |
| Land Area | 50.9 | 18.5 | 3,531,905.4 |
| Water Area | 2.1 | 0.2 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Stoddard, NH | Sullivan, NH | United States |
| Age 0 to 4 | 5.5% | 9.4% | 5.9% |
| Age 5 to 9 | 5.2% | 3.7% | 6.1% |
| Age 10 to 14 | 5.9% | 2.2% | 6.6% |
| Age 15 to 17 | 3.0% | 3.8% | 3.9% |
| Age 18 to 20 | 1.7% | 1.5% | 4.0% |
| Age 21 to 24 | 3.1% | 1.8% | 5.2% |
| Age 25 to 34 | 11.8% | 15.1% | 13.8% |
| Age 35 to 44 | 9.8% | 10.2% | 12.9% |
| Age 45 to 54 | 17.1% | 16.5% | 12.6% |
| Age 55 to 59 | 9.2% | 9.5% | 6.7% |
| Age 60 to 64 | 8.8% | 10.2% | 6.3% |
| Age 65 to 74 | 12.1% | 9.2% | 9.6% |
| Age 75 to 84 | 5.8% | 6.3% | 4.5% |
| Age 85 and over | 1.2% | 0.6% | 1.9% |
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| Race | | | |
| | Stoddard, NH | Sullivan, NH | United States |
| White | 96.9% | 93.1% | 59.4% |
| Black | 0.0% | 0.0% | 12.2% |
| Asian | 0.4% | 3.2% | 5.6% |
| Native American | 1.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 0.8% | 2.3% | 3.2% |
| Hispanic | 0.9% | 1.4% | 18.4% |
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| Marriage & Family | | | |
| | Stoddard, NH | Sullivan, NH | United States |
| Married Population | 61.2% | 56.3% | 49.8% |
| Currently Married | 59.5% | 54.1% | 48.0% |
| Married but Separated | 1.6% | 2.2% | 1.8% |
| Single Population | 38.8% | 43.7% | 50.2% |
| Never Married | 24.4% | 23.0% | 33.8% |
| Divorced | 8.4% | 15.2% | 10.8% |
| Widowed | 6.0% | 5.4% | 5.6% |
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| Household Size | 2.68 | 2.39 | 2.60 |
| Households | 415 | 272 | 124,010,992 |
| Family Households | 277 | 177 | 80,755,759 |
| Married couple, w/children | 35.0% | 37.9% | 30.5% |
| Married couple, no children | 59.6% | 49.2% | 42.9% |
| Non Family Households | 138 | 95 | 43,255,233 |
| Single householder, w/children | 4.0% | 9.6% | 15.8% |
| Single householder, no children | 1.4% | 3.4% | 10.8% |