| | Giddings, TX | Rockdale, TX | United States |
| Population | 4,986 | 5,378 | 329,725,481 |
| Female Population | 56.5% | 54.1% | 50.5% |
| Male Population | 43.5% | 46.0% | 49.5% |
| Median Age | 37.6 | 37.9 | 38.4 |
| space3 | | | |
| Population - 2010 | 4,882 | 5,493 | 309,327,143 |
| Population - 2000 | 5,105 | 5,439 | 285,036,114 |
| Population - 1990 | 4,093 | 5,235 | 251,960,433 |
| Pop. 2000 to Now | 0.8% | 0.2% | 15.6% |
| Pop. 1990 to Now | 25.8% | 4.1% | 30.8% |
| space4 | | | |
| Population Density | 944.9 | 1,342.5 | 93.4 |
| Land Area | 5.3 | 4.0 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Giddings, TX | Rockdale, TX | United States |
| Age 0 to 4 | 9.5% | 6.0% | 5.9% |
| Age 5 to 9 | 4.6% | 6.8% | 6.1% |
| Age 10 to 14 | 9.8% | 7.0% | 6.6% |
| Age 15 to 17 | 2.5% | 3.4% | 3.9% |
| Age 18 to 20 | 1.8% | 8.7% | 4.0% |
| Age 21 to 24 | 1.7% | 3.5% | 5.2% |
| Age 25 to 34 | 17.7% | 12.2% | 13.8% |
| Age 35 to 44 | 12.3% | 9.6% | 12.9% |
| Age 45 to 54 | 11.1% | 14.4% | 12.6% |
| Age 55 to 59 | 3.4% | 5.8% | 6.7% |
| Age 60 to 64 | 8.6% | 7.2% | 6.3% |
| Age 65 to 74 | 9.8% | 9.2% | 9.6% |
| Age 75 to 84 | 4.8% | 4.5% | 4.5% |
| Age 85 and over | 2.5% | 1.8% | 1.9% |
| space1 | | | |
| Race | | | |
| | Giddings, TX | Rockdale, TX | United States |
| White | 31.4% | 53.7% | 59.4% |
| Black | 16.0% | 10.7% | 12.2% |
| Asian | 2.9% | 0.8% | 5.6% |
| Native American | 0.0% | 0.3% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 2.2% | 0.7% | 3.2% |
| Hispanic | 47.6% | 33.8% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Giddings, TX | Rockdale, TX | United States |
| Married Population | 43.3% | 50.5% | 49.8% |
| Currently Married | 41.3% | 48.3% | 48.0% |
| Married but Separated | 2.0% | 2.2% | 1.8% |
| Single Population | 56.7% | 49.5% | 50.2% |
| Never Married | 27.6% | 31.2% | 33.8% |
| Divorced | 23.4% | 12.9% | 10.8% |
| Widowed | 5.7% | 5.4% | 5.6% |
| space5 | | | |
| Household Size | 2.89 | 2.62 | 2.60 |
| Households | 1,676 | 2,018 | 124,010,992 |
| Family Households | 1,306 | 1,131 | 80,755,759 |
| Married couple, w/children | 17.5% | 38.2% | 30.5% |
| Married couple, no children | 36.4% | 44.8% | 42.9% |
| Non Family Households | 370 | 887 | 43,255,233 |
| Single householder, w/children | 36.2% | 7.0% | 15.8% |
| Single householder, no children | 9.8% | 10.0% | 10.8% |