| | New Durham, NH | Marathon, TX | United States |
| Population | 2,698 | 427 | 329,725,481 |
| Female Population | 46.6% | 59.5% | 50.5% |
| Male Population | 53.5% | 40.5% | 49.5% |
| Median Age | 45.9 | 56.1 | 38.4 |
| space3 | | | |
| Population - 2010 | 2,654 | 456 | 309,327,143 |
| Population - 2000 | 2,220 | 455 | 285,036,114 |
| Population - 1990 | 1,974 | 507 | 251,960,433 |
| Pop. 2000 to Now | 22.9% | 9.5% | 15.6% |
| Pop. 1990 to Now | 38.2% | -1.8% | 30.8% |
| space4 | | | |
| Population Density | 65.0 | 81.2 | 93.4 |
| Land Area | 41.5 | 5.3 | 3,531,905.4 |
| Water Area | 2.6 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | New Durham, NH | Marathon, TX | United States |
| Age 0 to 4 | 6.8% | 4.7% | 5.9% |
| Age 5 to 9 | 4.3% | 0.0% | 6.1% |
| Age 10 to 14 | 4.1% | 3.7% | 6.6% |
| Age 15 to 17 | 5.7% | 3.5% | 3.9% |
| Age 18 to 20 | 2.2% | 0.0% | 4.0% |
| Age 21 to 24 | 2.3% | 0.9% | 5.2% |
| Age 25 to 34 | 9.9% | 17.1% | 13.8% |
| Age 35 to 44 | 13.6% | 6.3% | 12.9% |
| Age 45 to 54 | 19.4% | 8.2% | 12.6% |
| Age 55 to 59 | 7.6% | 14.1% | 6.7% |
| Age 60 to 64 | 6.4% | 16.6% | 6.3% |
| Age 65 to 74 | 14.6% | 9.8% | 9.6% |
| Age 75 to 84 | 3.1% | 13.1% | 4.5% |
| Age 85 and over | 0.0% | 1.9% | 1.9% |
| space1 | | | |
| Race | | | |
| | New Durham, NH | Marathon, TX | United States |
| White | 94.3% | 55.0% | 59.4% |
| Black | 0.0% | 0.0% | 12.2% |
| Asian | 0.1% | 0.0% | 5.6% |
| Native American | 1.1% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 3.9% | 0.0% | 3.2% |
| Hispanic | 0.6% | 45.0% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | New Durham, NH | Marathon, TX | United States |
| Married Population | 59.7% | 65.0% | 49.8% |
| Currently Married | 59.3% | 63.9% | 48.0% |
| Married but Separated | 0.4% | 1.0% | 1.8% |
| Single Population | 40.3% | 35.0% | 50.2% |
| Never Married | 29.8% | 12.0% | 33.8% |
| Divorced | 7.8% | 17.4% | 10.8% |
| Widowed | 2.7% | 5.6% | 5.6% |
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| Household Size | 2.68 | 1.53 | 2.60 |
| Households | 1,005 | 279 | 124,010,992 |
| Family Households | 760 | 210 | 80,755,759 |
| Married couple, w/children | 28.6% | 11.0% | 30.5% |
| Married couple, no children | 56.4% | 30.0% | 42.9% |
| Non Family Households | 245 | 69 | 43,255,233 |
| Single householder, w/children | 7.2% | 39.0% | 15.8% |
| Single householder, no children | 7.8% | 20.0% | 10.8% |