| | Eustace, TX | Buda, TX | United States |
| Population | 1,480 | 14,348 | 329,725,481 |
| Female Population | 53.9% | 50.6% | 50.5% |
| Male Population | 46.2% | 49.4% | 49.5% |
| Median Age | 34.7 | 36.2 | 38.4 |
| space3 | | | |
| Population - 2010 | 991 | 7,470 | 309,327,143 |
| Population - 2000 | 798 | 2,404 | 285,036,114 |
| Population - 1990 | 662 | 1,795 | 251,960,433 |
| Pop. 2000 to Now | 27.8% | 629.8% | 15.6% |
| Pop. 1990 to Now | 54.1% | 877.4% | 30.8% |
| space4 | | | |
| Population Density | 505.8 | 2,487.5 | 93.4 |
| Land Area | 2.9 | 5.8 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Eustace, TX | Buda, TX | United States |
| Age 0 to 4 | 8.4% | 6.9% | 5.9% |
| Age 5 to 9 | 10.0% | 10.4% | 6.1% |
| Age 10 to 14 | 10.3% | 4.6% | 6.6% |
| Age 15 to 17 | 2.9% | 4.8% | 3.9% |
| Age 18 to 20 | 1.8% | 2.5% | 4.0% |
| Age 21 to 24 | 5.9% | 6.9% | 5.2% |
| Age 25 to 34 | 11.8% | 11.5% | 13.8% |
| Age 35 to 44 | 8.7% | 18.2% | 12.9% |
| Age 45 to 54 | 10.9% | 19.5% | 12.6% |
| Age 55 to 59 | 10.8% | 2.6% | 6.7% |
| Age 60 to 64 | 3.9% | 2.7% | 6.3% |
| Age 65 to 74 | 7.0% | 7.5% | 9.6% |
| Age 75 to 84 | 5.9% | 1.8% | 4.5% |
| Age 85 and over | 1.8% | 0.2% | 1.9% |
| space1 | | | |
| Race | | | |
| | Eustace, TX | Buda, TX | United States |
| White | 76.1% | 66.0% | 59.4% |
| Black | 10.7% | 1.3% | 12.2% |
| Asian | 0.7% | 0.0% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.7% | 0.4% |
| Two or More Races | 4.3% | 2.7% | 3.2% |
| Hispanic | 8.1% | 29.4% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Eustace, TX | Buda, TX | United States |
| Married Population | 54.7% | 57.7% | 49.8% |
| Currently Married | 54.4% | 57.3% | 48.0% |
| Married but Separated | 0.4% | 0.4% | 1.8% |
| Single Population | 45.3% | 42.3% | 50.2% |
| Never Married | 24.4% | 28.4% | 33.8% |
| Divorced | 15.2% | 11.9% | 10.8% |
| Widowed | 5.6% | 2.0% | 5.6% |
| space5 | | | |
| Household Size | 3.09 | 2.57 | 2.60 |
| Households | 479 | 5,576 | 124,010,992 |
| Family Households | 334 | 4,035 | 80,755,759 |
| Married couple, w/children | 39.2% | 43.8% | 30.5% |
| Married couple, no children | 37.4% | 33.4% | 42.9% |
| Non Family Households | 145 | 1,541 | 43,255,233 |
| Single householder, w/children | 17.4% | 19.8% | 15.8% |
| Single householder, no children | 6.0% | 3.0% | 10.8% |