| | Southmayd, TX | Tioga, TX | United States |
| Population | 1,522 | 1,046 | 329,725,481 |
| Female Population | 48.2% | 45.4% | 50.5% |
| Male Population | 51.8% | 54.6% | 49.5% |
| Median Age | 35.9 | 40 | 38.4 |
| space3 | | | |
| Population - 2010 | 995 | 819 | 309,327,143 |
| Population - 2000 | 992 | 754 | 285,036,114 |
| Population - 1990 | 643 | 625 | 251,960,433 |
| Pop. 2000 to Now | 18.6% | 48.1% | 15.6% |
| Pop. 1990 to Now | 82.9% | 78.7% | 30.8% |
| space4 | | | |
| Population Density | 544.5 | 805.2 | 93.4 |
| Land Area | 2.8 | 1.3 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Southmayd, TX | Tioga, TX | United States |
| Age 0 to 4 | 10.8% | 3.2% | 5.9% |
| Age 5 to 9 | 6.1% | 4.1% | 6.1% |
| Age 10 to 14 | 8.1% | 6.7% | 6.6% |
| Age 15 to 17 | 3.5% | 2.5% | 3.9% |
| Age 18 to 20 | 2.4% | 1.6% | 4.0% |
| Age 21 to 24 | 3.5% | 16.8% | 5.2% |
| Age 25 to 34 | 13.2% | 6.9% | 13.8% |
| Age 35 to 44 | 15.1% | 12.3% | 12.9% |
| Age 45 to 54 | 7.0% | 19.5% | 12.6% |
| Age 55 to 59 | 9.2% | 7.6% | 6.7% |
| Age 60 to 64 | 9.1% | 4.4% | 6.3% |
| Age 65 to 74 | 6.5% | 9.8% | 9.6% |
| Age 75 to 84 | 4.5% | 3.3% | 4.5% |
| Age 85 and over | 0.9% | 1.2% | 1.9% |
| space1 | | | |
| Race | | | |
| | Southmayd, TX | Tioga, TX | United States |
| White | 58.5% | 88.8% | 59.4% |
| Black | 1.2% | 0.0% | 12.2% |
| Asian | 3.6% | 0.0% | 5.6% |
| Native American | 0.1% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.6% | 0.0% | 0.4% |
| Two or More Races | 3.6% | 1.7% | 3.2% |
| Hispanic | 32.3% | 9.5% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Southmayd, TX | Tioga, TX | United States |
| Married Population | 46.8% | 53.2% | 49.8% |
| Currently Married | 44.8% | 53.2% | 48.0% |
| Married but Separated | 2.0% | 0.0% | 1.8% |
| Single Population | 53.2% | 46.8% | 50.2% |
| Never Married | 37.6% | 31.9% | 33.8% |
| Divorced | 7.6% | 11.1% | 10.8% |
| Widowed | 8.0% | 3.8% | 5.6% |
| space5 | | | |
| Household Size | 2.92 | 2.68 | 2.60 |
| Households | 522 | 390 | 124,010,992 |
| Family Households | 394 | 290 | 80,755,759 |
| Married couple, w/children | 18.3% | 22.4% | 30.5% |
| Married couple, no children | 40.4% | 57.6% | 42.9% |
| Non Family Households | 128 | 100 | 43,255,233 |
| Single householder, w/children | 30.7% | 12.1% | 15.8% |
| Single householder, no children | 10.7% | 7.9% | 10.8% |