| | Gladewater, TX | Post, TX | United States |
| Population | 6,189 | 4,571 | 329,725,481 |
| Female Population | 58.8% | 35.5% | 50.5% |
| Male Population | 41.2% | 64.5% | 49.5% |
| Median Age | 33.8 | 42.2 | 38.4 |
| space3 | | | |
| Population - 2010 | 6,404 | 5,382 | 309,327,143 |
| Population - 2000 | 6,078 | 3,708 | 285,036,114 |
| Population - 1990 | 6,027 | 3,768 | 251,960,433 |
| Pop. 2000 to Now | 4.5% | 38.2% | 15.6% |
| Pop. 1990 to Now | 5.4% | 36.0% | 30.8% |
| space4 | | | |
| Population Density | 534.8 | 1,220.6 | 93.4 |
| Land Area | 11.6 | 3.7 | 3,531,905.4 |
| Water Area | 0.5 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Gladewater, TX | Post, TX | United States |
| Age 0 to 4 | 7.5% | 2.6% | 5.9% |
| Age 5 to 9 | 6.6% | 3.7% | 6.1% |
| Age 10 to 14 | 13.8% | 5.0% | 6.6% |
| Age 15 to 17 | 1.8% | 4.0% | 3.9% |
| Age 18 to 20 | 1.9% | 3.8% | 4.0% |
| Age 21 to 24 | 3.7% | 6.1% | 5.2% |
| Age 25 to 34 | 16.3% | 11.9% | 13.8% |
| Age 35 to 44 | 9.8% | 20.2% | 12.9% |
| Age 45 to 54 | 12.1% | 14.6% | 12.6% |
| Age 55 to 59 | 8.0% | 5.7% | 6.7% |
| Age 60 to 64 | 5.0% | 5.7% | 6.3% |
| Age 65 to 74 | 5.8% | 9.2% | 9.6% |
| Age 75 to 84 | 6.5% | 4.4% | 4.5% |
| Age 85 and over | 1.2% | 3.1% | 1.9% |
| space1 | | | |
| Race | | | |
| | Gladewater, TX | Post, TX | United States |
| White | 64.0% | 30.0% | 59.4% |
| Black | 14.1% | 7.4% | 12.2% |
| Asian | 1.3% | 1.9% | 5.6% |
| Native American | 0.1% | 0.2% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.2% | 0.0% | 0.4% |
| Two or More Races | 4.5% | 0.0% | 3.2% |
| Hispanic | 15.8% | 60.5% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Gladewater, TX | Post, TX | United States |
| Married Population | 36.0% | 53.4% | 49.8% |
| Currently Married | 33.2% | 47.2% | 48.0% |
| Married but Separated | 2.9% | 6.2% | 1.8% |
| Single Population | 64.0% | 46.6% | 50.2% |
| Never Married | 27.8% | 31.8% | 33.8% |
| Divorced | 27.6% | 9.4% | 10.8% |
| Widowed | 8.5% | 5.4% | 5.6% |
| space5 | | | |
| Household Size | 2.66 | 2.51 | 2.60 |
| Households | 2,257 | 1,260 | 124,010,992 |
| Family Households | 1,374 | 848 | 80,755,759 |
| Married couple, w/children | 18.9% | 39.0% | 30.5% |
| Married couple, no children | 29.0% | 47.2% | 42.9% |
| Non Family Households | 883 | 412 | 43,255,233 |
| Single householder, w/children | 35.5% | 4.2% | 15.8% |
| Single householder, no children | 16.5% | 9.6% | 10.8% |