| | Heath, TX | Sunnyvale, TX | United States |
| Population | 9,362 | 7,647 | 329,725,481 |
| Female Population | 47.3% | 47.0% | 50.5% |
| Male Population | 52.7% | 53.0% | 49.5% |
| Median Age | 44.8 | 42.4 | 38.4 |
| space3 | | | |
| Population - 2010 | 7,337 | 5,208 | 309,327,143 |
| Population - 2000 | 4,149 | 2,693 | 285,036,114 |
| Population - 1990 | 2,108 | 2,228 | 251,960,433 |
| Pop. 2000 to Now | 134.2% | 162.4% | 15.6% |
| Pop. 1990 to Now | 361.0% | 217.2% | 30.8% |
| space4 | | | |
| Population Density | 778.2 | 462.9 | 93.4 |
| Land Area | 12.0 | 16.5 | 3,531,905.4 |
| Water Area | 0.2 | 0.3 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Heath, TX | Sunnyvale, TX | United States |
| Age 0 to 4 | 4.2% | 3.2% | 5.9% |
| Age 5 to 9 | 7.8% | 7.7% | 6.1% |
| Age 10 to 14 | 8.4% | 12.3% | 6.6% |
| Age 15 to 17 | 6.5% | 2.9% | 3.9% |
| Age 18 to 20 | 3.4% | 2.9% | 4.0% |
| Age 21 to 24 | 3.7% | 5.0% | 5.2% |
| Age 25 to 34 | 3.0% | 9.1% | 13.8% |
| Age 35 to 44 | 13.6% | 9.7% | 12.9% |
| Age 45 to 54 | 14.6% | 16.9% | 12.6% |
| Age 55 to 59 | 8.4% | 9.5% | 6.7% |
| Age 60 to 64 | 10.0% | 8.0% | 6.3% |
| Age 65 to 74 | 10.7% | 9.4% | 9.6% |
| Age 75 to 84 | 4.6% | 2.6% | 4.5% |
| Age 85 and over | 1.4% | 0.7% | 1.9% |
| space1 | | | |
| Race | | | |
| | Heath, TX | Sunnyvale, TX | United States |
| White | 85.0% | 53.5% | 59.4% |
| Black | 1.0% | 11.5% | 12.2% |
| Asian | 3.5% | 20.7% | 5.6% |
| Native American | 0.6% | 0.1% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 1.7% | 3.7% | 3.2% |
| Hispanic | 8.2% | 10.5% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Heath, TX | Sunnyvale, TX | United States |
| Married Population | 70.5% | 68.3% | 49.8% |
| Currently Married | 70.3% | 68.0% | 48.0% |
| Married but Separated | 0.2% | 0.3% | 1.8% |
| Single Population | 29.5% | 31.7% | 50.2% |
| Never Married | 19.5% | 23.6% | 33.8% |
| Divorced | 5.1% | 5.6% | 10.8% |
| Widowed | 4.9% | 2.5% | 5.6% |
| space5 | | | |
| Household Size | 3.02 | 2.98 | 2.60 |
| Households | 3,101 | 2,569 | 124,010,992 |
| Family Households | 2,720 | 2,414 | 80,755,759 |
| Married couple, w/children | 42.5% | 37.3% | 30.5% |
| Married couple, no children | 51.2% | 43.0% | 42.9% |
| Non Family Households | 381 | 155 | 43,255,233 |
| Single householder, w/children | 3.8% | 12.6% | 15.8% |
| Single householder, no children | 2.4% | 7.1% | 10.8% |