| | Brownwood, TX | Gatesville, TX | United States |
| Population | 18,865 | 15,997 | 329,725,481 |
| Female Population | 51.0% | 57.9% | 50.5% |
| Male Population | 49.0% | 42.2% | 49.5% |
| Median Age | 35.4 | 39.6 | 38.4 |
| space3 | | | |
| Population - 2010 | 19,269 | 12,475 | 309,327,143 |
| Population - 2000 | 18,813 | 15,591 | 285,036,114 |
| Population - 1990 | 18,387 | 11,492 | 251,960,433 |
| Pop. 2000 to Now | -3.2% | -19.5% | 15.6% |
| Pop. 1990 to Now | -1.0% | 9.2% | 30.8% |
| space4 | | | |
| Population Density | 1,275.4 | 1,846.2 | 93.4 |
| Land Area | 14.8 | 8.7 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Brownwood, TX | Gatesville, TX | United States |
| Age 0 to 4 | 6.4% | 3.4% | 5.9% |
| Age 5 to 9 | 5.3% | 2.1% | 6.1% |
| Age 10 to 14 | 6.5% | 3.6% | 6.6% |
| Age 15 to 17 | 5.4% | 1.9% | 3.9% |
| Age 18 to 20 | 5.1% | 1.3% | 4.0% |
| Age 21 to 24 | 6.8% | 3.0% | 5.2% |
| Age 25 to 34 | 14.0% | 23.6% | 13.8% |
| Age 35 to 44 | 11.9% | 22.5% | 12.9% |
| Age 45 to 54 | 11.2% | 16.9% | 12.6% |
| Age 55 to 59 | 5.9% | 8.0% | 6.7% |
| Age 60 to 64 | 6.0% | 4.9% | 6.3% |
| Age 65 to 74 | 8.3% | 5.7% | 9.6% |
| Age 75 to 84 | 4.6% | 2.2% | 4.5% |
| Age 85 and over | 2.6% | 0.9% | 1.9% |
| space1 | | | |
| Race | | | |
| | Brownwood, TX | Gatesville, TX | United States |
| White | 62.6% | 50.7% | 59.4% |
| Black | 5.0% | 15.4% | 12.2% |
| Asian | 0.4% | 1.1% | 5.6% |
| Native American | 0.1% | 0.3% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.1% | 0.2% |
| Other | 0.4% | 0.0% | 0.4% |
| Two or More Races | 1.0% | 8.0% | 3.2% |
| Hispanic | 30.5% | 24.4% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Brownwood, TX | Gatesville, TX | United States |
| Married Population | 47.5% | 35.1% | 49.8% |
| Currently Married | 45.6% | 28.1% | 48.0% |
| Married but Separated | 1.9% | 7.0% | 1.8% |
| Single Population | 52.5% | 64.9% | 50.2% |
| Never Married | 31.4% | 39.4% | 33.8% |
| Divorced | 13.9% | 19.6% | 10.8% |
| Widowed | 7.2% | 5.9% | 5.6% |
| space5 | | | |
| Household Size | 2.49 | 2.39 | 2.60 |
| Households | 7,158 | 3,027 | 124,010,992 |
| Family Households | 4,564 | 1,775 | 80,755,759 |
| Married couple, w/children | 33.9% | 29.6% | 30.5% |
| Married couple, no children | 37.6% | 43.9% | 42.9% |
| Non Family Households | 2,594 | 1,252 | 43,255,233 |
| Single householder, w/children | 19.1% | 18.7% | 15.8% |
| Single householder, no children | 9.4% | 7.8% | 10.8% |