| | Montgomery, TX | Lumberton, TX | United States |
| Population | 1,617 | 13,447 | 329,725,481 |
| Female Population | 52.0% | 51.2% | 50.5% |
| Male Population | 48.0% | 48.8% | 49.5% |
| Median Age | 41.2 | 41.1 | 38.4 |
| space3 | | | |
| Population - 2010 | 624 | 12,021 | 309,327,143 |
| Population - 2000 | 489 | 8,731 | 285,036,114 |
| Population - 1990 | 356 | 6,640 | 251,960,433 |
| Pop. 2000 to Now | 235.2% | 53.3% | 15.6% |
| Pop. 1990 to Now | 360.4% | 101.6% | 30.8% |
| space4 | | | |
| Population Density | 343.5 | 1,002.8 | 93.4 |
| Land Area | 4.7 | 13.4 | 3,531,905.4 |
| Water Area | 0.1 | 0.1 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Montgomery, TX | Lumberton, TX | United States |
| Age 0 to 4 | 9.4% | 5.7% | 5.9% |
| Age 5 to 9 | 3.9% | 7.4% | 6.1% |
| Age 10 to 14 | 3.5% | 7.7% | 6.6% |
| Age 15 to 17 | 4.6% | 3.3% | 3.9% |
| Age 18 to 20 | 6.1% | 2.6% | 4.0% |
| Age 21 to 24 | 4.6% | 3.0% | 5.2% |
| Age 25 to 34 | 10.6% | 12.3% | 13.8% |
| Age 35 to 44 | 11.8% | 14.4% | 12.9% |
| Age 45 to 54 | 10.6% | 14.6% | 12.6% |
| Age 55 to 59 | 9.3% | 3.9% | 6.7% |
| Age 60 to 64 | 3.6% | 5.3% | 6.3% |
| Age 65 to 74 | 15.8% | 12.7% | 9.6% |
| Age 75 to 84 | 5.6% | 5.3% | 4.5% |
| Age 85 and over | 0.6% | 1.9% | 1.9% |
| space1 | | | |
| Race | | | |
| | Montgomery, TX | Lumberton, TX | United States |
| White | 86.9% | 91.2% | 59.4% |
| Black | 2.7% | 0.0% | 12.2% |
| Asian | 1.0% | 0.6% | 5.6% |
| Native American | 0.2% | 0.2% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 2.5% | 1.5% | 3.2% |
| Hispanic | 6.7% | 6.5% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Montgomery, TX | Lumberton, TX | United States |
| Married Population | 57.2% | 60.9% | 49.8% |
| Currently Married | 56.7% | 58.2% | 48.0% |
| Married but Separated | 0.6% | 2.7% | 1.8% |
| Single Population | 42.8% | 39.1% | 50.2% |
| Never Married | 29.6% | 15.9% | 33.8% |
| Divorced | 8.8% | 15.4% | 10.8% |
| Widowed | 4.4% | 7.8% | 5.6% |
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| Household Size | 2.51 | 2.60 | 2.60 |
| Households | 645 | 5,135 | 124,010,992 |
| Family Households | 475 | 3,929 | 80,755,759 |
| Married couple, w/children | 28.2% | 30.8% | 30.5% |
| Married couple, no children | 50.7% | 46.6% | 42.9% |
| Non Family Households | 170 | 1,206 | 43,255,233 |
| Single householder, w/children | 14.1% | 13.0% | 15.8% |
| Single householder, no children | 6.9% | 9.6% | 10.8% |