| | Bastrop, TX | Granbury, TX | United States |
| Population | 9,531 | 10,453 | 329,725,481 |
| Female Population | 51.3% | 55.6% | 50.5% |
| Male Population | 48.7% | 44.4% | 49.5% |
| Median Age | 40.5 | 45 | 38.4 |
| space3 | | | |
| Population - 2010 | 7,368 | 8,039 | 309,327,143 |
| Population - 2000 | 5,340 | 5,718 | 285,036,114 |
| Population - 1990 | 4,044 | 4,045 | 251,960,433 |
| Pop. 2000 to Now | 82.5% | 94.1% | 15.6% |
| Pop. 1990 to Now | 140.9% | 174.4% | 30.8% |
| space4 | | | |
| Population Density | 877.0 | 780.8 | 93.4 |
| Land Area | 10.9 | 13.4 | 3,531,905.4 |
| Water Area | 0.1 | 0.8 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Bastrop, TX | Granbury, TX | United States |
| Age 0 to 4 | 8.4% | 8.7% | 5.9% |
| Age 5 to 9 | 2.1% | 3.5% | 6.1% |
| Age 10 to 14 | 5.6% | 2.8% | 6.6% |
| Age 15 to 17 | 3.5% | 2.6% | 3.9% |
| Age 18 to 20 | 4.5% | 2.3% | 4.0% |
| Age 21 to 24 | 7.7% | 5.6% | 5.2% |
| Age 25 to 34 | 13.0% | 18.8% | 13.8% |
| Age 35 to 44 | 13.4% | 5.7% | 12.9% |
| Age 45 to 54 | 15.5% | 7.4% | 12.6% |
| Age 55 to 59 | 4.8% | 6.8% | 6.7% |
| Age 60 to 64 | 4.7% | 6.1% | 6.3% |
| Age 65 to 74 | 8.7% | 12.6% | 9.6% |
| Age 75 to 84 | 5.8% | 11.1% | 4.5% |
| Age 85 and over | 2.2% | 6.0% | 1.9% |
| space1 | | | |
| Race | | | |
| | Bastrop, TX | Granbury, TX | United States |
| White | 56.3% | 85.4% | 59.4% |
| Black | 3.8% | 1.5% | 12.2% |
| Asian | 3.1% | 0.6% | 5.6% |
| Native American | 0.2% | 0.3% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 1.1% | 1.6% | 3.2% |
| Hispanic | 35.5% | 10.5% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Bastrop, TX | Granbury, TX | United States |
| Married Population | 54.0% | 55.8% | 49.8% |
| Currently Married | 51.3% | 54.2% | 48.0% |
| Married but Separated | 2.7% | 1.5% | 1.8% |
| Single Population | 46.0% | 44.2% | 50.2% |
| Never Married | 25.9% | 20.6% | 33.8% |
| Divorced | 13.5% | 13.3% | 10.8% |
| Widowed | 6.6% | 10.4% | 5.6% |
| space5 | | | |
| Household Size | 2.43 | 2.07 | 2.60 |
| Households | 3,687 | 4,747 | 124,010,992 |
| Family Households | 2,296 | 2,877 | 80,755,759 |
| Married couple, w/children | 44.6% | 26.6% | 30.5% |
| Married couple, no children | 36.8% | 55.9% | 42.9% |
| Non Family Households | 1,391 | 1,870 | 43,255,233 |
| Single householder, w/children | 4.8% | 13.1% | 15.8% |
| Single householder, no children | 13.7% | 4.4% | 10.8% |