| | Quanah, TX | Martin, TN | United States |
| Population | 2,083 | 10,536 | 329,725,481 |
| Female Population | 51.8% | 50.5% | 50.5% |
| Male Population | 48.2% | 49.6% | 49.5% |
| Median Age | 43.1 | 24.7 | 38.4 |
| space3 | | | |
| Population - 2010 | 2,648 | 11,481 | 309,327,143 |
| Population - 2000 | 3,022 | 10,515 | 285,036,114 |
| Population - 1990 | 3,413 | 8,600 | 251,960,433 |
| Pop. 2000 to Now | -16.2% | 0.5% | 15.6% |
| Pop. 1990 to Now | -25.8% | 22.9% | 30.8% |
| space4 | | | |
| Population Density | 599.3 | 849.3 | 93.4 |
| Land Area | 3.5 | 12.4 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Quanah, TX | Martin, TN | United States |
| Age 0 to 4 | 7.9% | 4.9% | 5.9% |
| Age 5 to 9 | 7.2% | 5.9% | 6.1% |
| Age 10 to 14 | 7.4% | 2.8% | 6.6% |
| Age 15 to 17 | 3.5% | 2.6% | 3.9% |
| Age 18 to 20 | 1.4% | 18.4% | 4.0% |
| Age 21 to 24 | 1.6% | 15.9% | 5.2% |
| Age 25 to 34 | 9.6% | 10.8% | 13.8% |
| Age 35 to 44 | 14.1% | 8.9% | 12.9% |
| Age 45 to 54 | 10.9% | 9.2% | 12.6% |
| Age 55 to 59 | 5.5% | 4.8% | 6.7% |
| Age 60 to 64 | 8.5% | 4.8% | 6.3% |
| Age 65 to 74 | 14.5% | 4.7% | 9.6% |
| Age 75 to 84 | 5.0% | 4.5% | 4.5% |
| Age 85 and over | 3.0% | 1.9% | 1.9% |
| space1 | | | |
| Race | | | |
| | Quanah, TX | Martin, TN | United States |
| White | 64.9% | 75.8% | 59.4% |
| Black | 1.6% | 16.3% | 12.2% |
| Asian | 3.7% | 1.9% | 5.6% |
| Native American | 0.9% | 0.7% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.1% | 0.2% |
| Other | 0.0% | 0.5% | 0.4% |
| Two or More Races | 4.8% | 1.5% | 3.2% |
| Hispanic | 24.1% | 3.2% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Quanah, TX | Martin, TN | United States |
| Married Population | 54.7% | 32.0% | 49.8% |
| Currently Married | 51.1% | 31.0% | 48.0% |
| Married but Separated | 3.5% | 1.0% | 1.8% |
| Single Population | 45.3% | 68.0% | 50.2% |
| Never Married | 16.0% | 53.8% | 33.8% |
| Divorced | 21.3% | 8.0% | 10.8% |
| Widowed | 8.0% | 6.1% | 5.6% |
| space5 | | | |
| Household Size | 2.67 | 2.24 | 2.60 |
| Households | 769 | 3,791 | 124,010,992 |
| Family Households | 473 | 2,035 | 80,755,759 |
| Married couple, w/children | 27.5% | 25.5% | 30.5% |
| Married couple, no children | 52.6% | 39.9% | 42.9% |
| Non Family Households | 296 | 1,756 | 43,255,233 |
| Single householder, w/children | 13.7% | 20.9% | 15.8% |
| Single householder, no children | 6.1% | 13.7% | 10.8% |