| | San Antonio Heights, CA | Greenville, TX | United States |
| Population | 3,111 | 28,128 | 329,725,481 |
| Female Population | 55.8% | 50.0% | 50.5% |
| Male Population | 44.2% | 50.0% | 49.5% |
| Median Age | 47.3 | 35.9 | 38.4 |
| space3 | | | |
| Population - 2010 | 3,979 | 25,623 | 309,327,143 |
| Population - 2000 | 3,122 | 23,960 | 285,036,114 |
| Population - 1990 | 2,935 | 23,071 | 251,960,433 |
| Pop. 2000 to Now | 2.5% | 22.6% | 15.6% |
| Pop. 1990 to Now | 9.1% | 27.3% | 30.8% |
| space4 | | | |
| Population Density | 1,321.6 | 871.2 | 93.4 |
| Land Area | 2.4 | 32.3 | 3,531,905.4 |
| Water Area | 0.2 | 0.8 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | San Antonio Heights, CA | Greenville, TX | United States |
| Age 0 to 4 | 3.6% | 5.7% | 5.9% |
| Age 5 to 9 | 7.8% | 7.9% | 6.1% |
| Age 10 to 14 | 6.1% | 7.7% | 6.6% |
| Age 15 to 17 | 4.4% | 3.3% | 3.9% |
| Age 18 to 20 | 3.5% | 2.7% | 4.0% |
| Age 21 to 24 | 3.8% | 5.2% | 5.2% |
| Age 25 to 34 | 6.0% | 16.2% | 13.8% |
| Age 35 to 44 | 12.0% | 13.3% | 12.9% |
| Age 45 to 54 | 20.5% | 10.2% | 12.6% |
| Age 55 to 59 | 7.0% | 4.6% | 6.7% |
| Age 60 to 64 | 7.2% | 6.4% | 6.3% |
| Age 65 to 74 | 8.4% | 8.7% | 9.6% |
| Age 75 to 84 | 6.6% | 5.7% | 4.5% |
| Age 85 and over | 3.2% | 2.5% | 1.9% |
| space1 | | | |
| Race | | | |
| | San Antonio Heights, CA | Greenville, TX | United States |
| White | 58.1% | 57.1% | 59.4% |
| Black | 0.9% | 13.2% | 12.2% |
| Asian | 6.8% | 1.1% | 5.6% |
| Native American | 0.0% | 0.4% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.1% | 0.4% |
| Two or More Races | 4.5% | 5.1% | 3.2% |
| Hispanic | 29.8% | 23.1% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | San Antonio Heights, CA | Greenville, TX | United States |
| Married Population | 56.4% | 47.3% | 49.8% |
| Currently Married | 53.5% | 45.3% | 48.0% |
| Married but Separated | 2.9% | 2.0% | 1.8% |
| Single Population | 43.6% | 52.7% | 50.2% |
| Never Married | 31.2% | 31.8% | 33.8% |
| Divorced | 8.7% | 14.1% | 10.8% |
| Widowed | 3.7% | 6.8% | 5.6% |
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| Household Size | 2.91 | 2.50 | 2.60 |
| Households | 1,062 | 10,942 | 124,010,992 |
| Family Households | 781 | 6,788 | 80,755,759 |
| Married couple, w/children | 41.0% | 24.2% | 30.5% |
| Married couple, no children | 44.9% | 36.1% | 42.9% |
| Non Family Households | 281 | 4,154 | 43,255,233 |
| Single householder, w/children | 4.7% | 21.3% | 15.8% |
| Single householder, no children | 9.3% | 18.4% | 10.8% |