| | Robstown, TX | Canyon, TX | United States |
| Population | 10,372 | 14,669 | 329,725,481 |
| Female Population | 52.4% | 51.4% | 50.5% |
| Male Population | 47.6% | 48.7% | 49.5% |
| Median Age | 36.7 | 27.3 | 38.4 |
| space3 | | | |
| Population - 2010 | 11,323 | 13,359 | 309,327,143 |
| Population - 2000 | 12,727 | 12,875 | 285,036,114 |
| Population - 1990 | 12,849 | 11,365 | 251,960,433 |
| Pop. 2000 to Now | -12.5% | 27.3% | 15.6% |
| Pop. 1990 to Now | -13.4% | 44.2% | 30.8% |
| space4 | | | |
| Population Density | 669.0 | 2,081.9 | 93.4 |
| Land Area | 15.5 | 7.0 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Robstown, TX | Canyon, TX | United States |
| Age 0 to 4 | 6.8% | 5.9% | 5.9% |
| Age 5 to 9 | 10.1% | 5.2% | 6.1% |
| Age 10 to 14 | 4.7% | 6.7% | 6.6% |
| Age 15 to 17 | 3.0% | 4.1% | 3.9% |
| Age 18 to 20 | 2.8% | 14.3% | 4.0% |
| Age 21 to 24 | 7.4% | 10.7% | 5.2% |
| Age 25 to 34 | 12.0% | 12.7% | 13.8% |
| Age 35 to 44 | 11.3% | 9.9% | 12.9% |
| Age 45 to 54 | 8.2% | 11.6% | 12.6% |
| Age 55 to 59 | 5.7% | 5.3% | 6.7% |
| Age 60 to 64 | 5.1% | 3.5% | 6.3% |
| Age 65 to 74 | 10.3% | 5.4% | 9.6% |
| Age 75 to 84 | 4.9% | 3.1% | 4.5% |
| Age 85 and over | 7.6% | 1.6% | 1.9% |
| space1 | | | |
| Race | | | |
| | Robstown, TX | Canyon, TX | United States |
| White | 5.8% | 74.2% | 59.4% |
| Black | 0.1% | 3.1% | 12.2% |
| Asian | 0.0% | 1.7% | 5.6% |
| Native American | 0.0% | 0.6% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.3% | 0.2% |
| Other | 0.3% | 0.0% | 0.4% |
| Two or More Races | 0.0% | 0.8% | 3.2% |
| Hispanic | 93.8% | 19.2% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Robstown, TX | Canyon, TX | United States |
| Married Population | 38.0% | 44.6% | 49.8% |
| Currently Married | 34.7% | 43.3% | 48.0% |
| Married but Separated | 3.3% | 1.3% | 1.8% |
| Single Population | 62.0% | 55.4% | 50.2% |
| Never Married | 35.0% | 41.0% | 33.8% |
| Divorced | 11.3% | 10.9% | 10.8% |
| Widowed | 15.6% | 3.5% | 5.6% |
| space5 | | | |
| Household Size | 2.69 | 2.55 | 2.60 |
| Households | 3,822 | 5,134 | 124,010,992 |
| Family Households | 2,506 | 3,345 | 80,755,759 |
| Married couple, w/children | 20.3% | 34.8% | 30.5% |
| Married couple, no children | 23.9% | 40.4% | 42.9% |
| Non Family Households | 1,316 | 1,789 | 43,255,233 |
| Single householder, w/children | 27.5% | 17.2% | 15.8% |
| Single householder, no children | 28.3% | 7.6% | 10.8% |