| | Hart, TX | Bethel, ME | United States |
| Population | 1,092 | 2,511 | 329,725,481 |
| Female Population | 49.8% | 46.1% | 50.5% |
| Male Population | 50.2% | 53.9% | 49.5% |
| Median Age | 28.6 | 48.1 | 38.4 |
| space3 | | | |
| Population - 2010 | 1,123 | 2,599 | 309,327,143 |
| Population - 2000 | 1,198 | 2,411 | 285,036,114 |
| Population - 1990 | 1,221 | 2,329 | 251,960,433 |
| Pop. 2000 to Now | -15.2% | 14.0% | 15.6% |
| Pop. 1990 to Now | -16.8% | 18.0% | 30.8% |
| space4 | | | |
| Population Density | 1,479.7 | 38.9 | 93.4 |
| Land Area | 0.7 | 64.6 | 3,531,905.4 |
| Water Area | 0.0 | 1.3 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Hart, TX | Bethel, ME | United States |
| Age 0 to 4 | 12.1% | 5.7% | 5.9% |
| Age 5 to 9 | 12.4% | 5.0% | 6.1% |
| Age 10 to 14 | 8.1% | 3.5% | 6.6% |
| Age 15 to 17 | 2.9% | 0.6% | 3.9% |
| Age 18 to 20 | 7.2% | 1.9% | 4.0% |
| Age 21 to 24 | 3.8% | 3.4% | 5.2% |
| Age 25 to 34 | 12.6% | 7.4% | 13.8% |
| Age 35 to 44 | 11.2% | 19.9% | 12.9% |
| Age 45 to 54 | 7.8% | 8.0% | 12.6% |
| Age 55 to 59 | 4.0% | 8.3% | 6.7% |
| Age 60 to 64 | 5.7% | 7.3% | 6.3% |
| Age 65 to 74 | 7.5% | 12.8% | 9.6% |
| Age 75 to 84 | 4.1% | 7.6% | 4.5% |
| Age 85 and over | 0.5% | 8.7% | 1.9% |
| space1 | | | |
| Race | | | |
| | Hart, TX | Bethel, ME | United States |
| White | 7.9% | 88.4% | 59.4% |
| Black | 2.7% | 0.0% | 12.2% |
| Asian | 0.0% | 0.0% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.3% | 5.3% | 0.4% |
| Two or More Races | 0.0% | 4.6% | 3.2% |
| Hispanic | 89.2% | 1.8% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Hart, TX | Bethel, ME | United States |
| Married Population | 52.1% | 43.6% | 49.8% |
| Currently Married | 48.6% | 43.3% | 48.0% |
| Married but Separated | 3.5% | 0.3% | 1.8% |
| Single Population | 47.9% | 56.4% | 50.2% |
| Never Married | 35.7% | 29.1% | 33.8% |
| Divorced | 3.5% | 17.5% | 10.8% |
| Widowed | 8.7% | 9.8% | 5.6% |
| space5 | | | |
| Household Size | 3.59 | 2.04 | 2.60 |
| Households | 304 | 1,228 | 124,010,992 |
| Family Households | 238 | 618 | 80,755,759 |
| Married couple, w/children | 26.1% | 29.8% | 30.5% |
| Married couple, no children | 45.0% | 51.8% | 42.9% |
| Non Family Households | 66 | 610 | 43,255,233 |
| Single householder, w/children | 24.4% | 15.7% | 15.8% |
| Single householder, no children | 4.6% | 2.8% | 10.8% |