| | Shady Hollow, TX | Manchaca, TX | United States |
| Population | 4,587 | 1,685 | 329,725,481 |
| Female Population | 49.0% | 44.0% | 50.5% |
| Male Population | 51.0% | 56.0% | 49.5% |
| Median Age | 55.6 | 37.4 | 38.4 |
| space3 | | | |
| Population - 2010 | 4,813 | 958 | 309,327,143 |
| Population - 2000 | 5,140 | 403 | 285,036,114 |
| Population - 1990 | 1,967 | 375 | 251,960,433 |
| Pop. 2000 to Now | -3.3% | 181.9% | 15.6% |
| Pop. 1990 to Now | 152.7% | 202.9% | 30.8% |
| space4 | | | |
| Population Density | 2,117.7 | 870.4 | 93.4 |
| Land Area | 2.2 | 1.9 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Shady Hollow, TX | Manchaca, TX | United States |
| Age 0 to 4 | 2.1% | 13.4% | 5.9% |
| Age 5 to 9 | 6.6% | 2.1% | 6.1% |
| Age 10 to 14 | 5.6% | 4.2% | 6.6% |
| Age 15 to 17 | 6.1% | 4.6% | 3.9% |
| Age 18 to 20 | 0.3% | 1.4% | 4.0% |
| Age 21 to 24 | 2.1% | 2.6% | 5.2% |
| Age 25 to 34 | 2.4% | 17.9% | 13.8% |
| Age 35 to 44 | 13.1% | 15.9% | 12.9% |
| Age 45 to 54 | 11.0% | 13.5% | 12.6% |
| Age 55 to 59 | 9.3% | 6.3% | 6.7% |
| Age 60 to 64 | 13.9% | 9.1% | 6.3% |
| Age 65 to 74 | 20.8% | 6.5% | 9.6% |
| Age 75 to 84 | 3.7% | 2.6% | 4.5% |
| Age 85 and over | 3.1% | 0.0% | 1.9% |
| space1 | | | |
| Race | | | |
| | Shady Hollow, TX | Manchaca, TX | United States |
| White | 64.2% | 67.1% | 59.4% |
| Black | 5.1% | 1.3% | 12.2% |
| Asian | 5.5% | 1.6% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 2.9% | 2.3% | 3.2% |
| Hispanic | 22.4% | 27.8% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Shady Hollow, TX | Manchaca, TX | United States |
| Married Population | 68.2% | 57.9% | 49.8% |
| Currently Married | 66.8% | 57.9% | 48.0% |
| Married but Separated | 1.4% | 0.0% | 1.8% |
| Single Population | 31.8% | 42.1% | 50.2% |
| Never Married | 20.9% | 17.0% | 33.8% |
| Divorced | 7.8% | 25.0% | 10.8% |
| Widowed | 3.1% | 0.0% | 5.6% |
| space5 | | | |
| Household Size | 2.71 | 3.02 | 2.60 |
| Households | 1,685 | 556 | 124,010,992 |
| Family Households | 1,424 | 389 | 80,755,759 |
| Married couple, w/children | 30.4% | 39.3% | 30.5% |
| Married couple, no children | 60.5% | 57.3% | 42.9% |
| Non Family Households | 261 | 167 | 43,255,233 |
| Single householder, w/children | 5.4% | 0.0% | 15.8% |
| Single householder, no children | 3.7% | 3.3% | 10.8% |