| | Watauga, TX | Sulphur Springs, TX | United States |
| Population | 23,649 | 15,825 | 329,725,481 |
| Female Population | 48.4% | 52.2% | 50.5% |
| Male Population | 51.6% | 47.8% | 49.5% |
| Median Age | 35.4 | 37.8 | 38.4 |
| space3 | | | |
| Population - 2010 | 23,545 | 15,450 | 309,327,143 |
| Population - 2000 | 21,908 | 14,551 | 285,036,114 |
| Population - 1990 | 20,009 | 14,062 | 251,960,433 |
| Pop. 2000 to Now | 10.4% | 11.8% | 15.6% |
| Pop. 1990 to Now | 20.9% | 15.7% | 30.8% |
| space4 | | | |
| Population Density | 5,683.5 | 781.8 | 93.4 |
| Land Area | 4.2 | 20.2 | 3,531,905.4 |
| Water Area | 0.0 | 3.4 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Watauga, TX | Sulphur Springs, TX | United States |
| Age 0 to 4 | 6.8% | 6.0% | 5.9% |
| Age 5 to 9 | 6.7% | 7.2% | 6.1% |
| Age 10 to 14 | 6.1% | 6.8% | 6.6% |
| Age 15 to 17 | 3.9% | 4.3% | 3.9% |
| Age 18 to 20 | 4.5% | 3.2% | 4.0% |
| Age 21 to 24 | 5.8% | 7.2% | 5.2% |
| Age 25 to 34 | 15.4% | 11.7% | 13.8% |
| Age 35 to 44 | 13.8% | 10.9% | 12.9% |
| Age 45 to 54 | 10.7% | 14.3% | 12.6% |
| Age 55 to 59 | 7.2% | 5.0% | 6.7% |
| Age 60 to 64 | 6.2% | 5.7% | 6.3% |
| Age 65 to 74 | 8.9% | 10.5% | 9.6% |
| Age 75 to 84 | 3.1% | 4.8% | 4.5% |
| Age 85 and over | 0.9% | 2.3% | 1.9% |
| space1 | | | |
| Race | | | |
| | Watauga, TX | Sulphur Springs, TX | United States |
| White | 59.5% | 65.6% | 59.4% |
| Black | 6.5% | 12.7% | 12.2% |
| Asian | 5.8% | 1.0% | 5.6% |
| Native American | 0.4% | 0.2% | 0.6% |
| Hawaiian, Pacific Islander | 0.2% | 0.1% | 0.2% |
| Other | 0.3% | 0.3% | 0.4% |
| Two or More Races | 1.6% | 2.2% | 3.2% |
| Hispanic | 25.7% | 17.9% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Watauga, TX | Sulphur Springs, TX | United States |
| Married Population | 55.6% | 48.1% | 49.8% |
| Currently Married | 54.3% | 45.2% | 48.0% |
| Married but Separated | 1.3% | 2.9% | 1.8% |
| Single Population | 44.4% | 51.9% | 50.2% |
| Never Married | 28.0% | 27.6% | 33.8% |
| Divorced | 12.1% | 15.9% | 10.8% |
| Widowed | 4.3% | 8.3% | 5.6% |
| space5 | | | |
| Household Size | 3.05 | 2.52 | 2.60 |
| Households | 7,729 | 6,142 | 124,010,992 |
| Family Households | 6,052 | 3,855 | 80,755,759 |
| Married couple, w/children | 34.5% | 32.6% | 30.5% |
| Married couple, no children | 45.3% | 34.2% | 42.9% |
| Non Family Households | 1,677 | 2,287 | 43,255,233 |
| Single householder, w/children | 10.9% | 18.6% | 15.8% |
| Single householder, no children | 9.3% | 14.6% | 10.8% |