| | Sam Rayburn, TX | Lumberton, TX | United States |
| Population | 1,100 | 13,447 | 329,725,481 |
| Female Population | 51.6% | 51.2% | 50.5% |
| Male Population | 48.4% | 48.8% | 49.5% |
| Median Age | 48.2 | 41.1 | 38.4 |
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| Population - 2010 | 1,119 | 12,021 | 309,327,143 |
| Population - 2000 | 929 | 8,731 | 285,036,114 |
| Population - 1990 | 699 | 6,640 | 251,960,433 |
| Pop. 2000 to Now | -19.9% | 53.3% | 15.6% |
| Pop. 1990 to Now | 6.4% | 101.6% | 30.8% |
| space4 | | | |
| Population Density | 129.9 | 1,002.8 | 93.4 |
| Land Area | 8.5 | 13.4 | 3,531,905.4 |
| Water Area | 1.5 | 0.1 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Sam Rayburn, TX | Lumberton, TX | United States |
| Age 0 to 4 | 7.3% | 5.7% | 5.9% |
| Age 5 to 9 | 6.8% | 7.4% | 6.1% |
| Age 10 to 14 | 11.4% | 7.7% | 6.6% |
| Age 15 to 17 | 0.0% | 3.3% | 3.9% |
| Age 18 to 20 | 0.5% | 2.6% | 4.0% |
| Age 21 to 24 | 5.2% | 3.0% | 5.2% |
| Age 25 to 34 | 8.4% | 12.3% | 13.8% |
| Age 35 to 44 | 5.2% | 14.4% | 12.9% |
| Age 45 to 54 | 12.1% | 14.6% | 12.6% |
| Age 55 to 59 | 8.3% | 3.9% | 6.7% |
| Age 60 to 64 | 8.8% | 5.3% | 6.3% |
| Age 65 to 74 | 14.6% | 12.7% | 9.6% |
| Age 75 to 84 | 7.1% | 5.3% | 4.5% |
| Age 85 and over | 4.5% | 1.9% | 1.9% |
| space1 | | | |
| Race | | | |
| | Sam Rayburn, TX | Lumberton, TX | United States |
| White | 92.8% | 91.2% | 59.4% |
| Black | 0.0% | 0.0% | 12.2% |
| Asian | 0.9% | 0.6% | 5.6% |
| Native American | 0.1% | 0.2% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 1.3% | 1.5% | 3.2% |
| Hispanic | 4.9% | 6.5% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Sam Rayburn, TX | Lumberton, TX | United States |
| Married Population | 66.7% | 60.9% | 49.8% |
| Currently Married | 66.0% | 58.2% | 48.0% |
| Married but Separated | 0.7% | 2.7% | 1.8% |
| Single Population | 33.3% | 39.1% | 50.2% |
| Never Married | 7.2% | 15.9% | 33.8% |
| Divorced | 14.9% | 15.4% | 10.8% |
| Widowed | 11.2% | 7.8% | 5.6% |
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| Household Size | 2.46 | 2.60 | 2.60 |
| Households | 448 | 5,135 | 124,010,992 |
| Family Households | 306 | 3,929 | 80,755,759 |
| Married couple, w/children | 28.4% | 30.8% | 30.5% |
| Married couple, no children | 50.7% | 46.6% | 42.9% |
| Non Family Households | 142 | 1,206 | 43,255,233 |
| Single householder, w/children | 20.9% | 13.0% | 15.8% |
| Single householder, no children | 0.0% | 9.6% | 10.8% |