| PEOPLE | San Antonio | Port Isabel | United States |
| Population | 1,327,407 | 5,006 | 308,035,306 |
| Pop. Density | 2,880 | 747 | 87 |
| Pop. Change | 16.41% | 1.26% | 8.07% |
| Median Age | 32.8 | 34.4 | 37.3 |
| Households | 479,642 | 1,683 | 116,716,292 |
| Household Size | 2.7 | 3.01 | 2.58 |
| Male Population | 48.79% | 49.24% | 49.27% |
| Female Population | 51.21% | 50.76% | 50.96% |
| Married Population | 40.40% | 46.32% | 47.02% |
| Single Population | 59.60% | 53.68% | 52.98% |
| ESTIMATED TOTAL POPULATION BY AGE | | | |
| Age 0 to 4 | 7.57% | 9.25% | 6.56% |
| Age 5 to 9 | 7.48% | 8.07% | 6.61% |
| Age 10 to 14 | 7.34% | 7.13% | 6.71% |
| Age 15 to 17 | 4.43% | 4.14% | 4.21% |
| Age 18 to 20 | 3.29% | 2.94% | 2.95% |
| Age 21 to 24 | 8.11% | 6.87% | 7.01% |
| Age 25 to 34 | 14.85% | 12.31% | 13.33% |
| Age 35 to 44 | 13.23% | 11.53% | 13.33% |
| Age 45 to 49 | 13.17% | 12.29% | 14.61% |
| Age 50 to 54 | 13.17% | 12.29% | 14.61% |
| Age 55 to 59 | 10.08% | 12.01% | 11.84% |
| Age 60 to 64 | 10.08% | 12.01% | 11.84% |
| Age 65 to 74 | 5.62% | 7.87% | 7.05% |
| Age 75 to 84 | 3.46% | 4.47% | 4.24% |
| Age 85 and over | 1.36% | 1.14% | 1.78% |
| RACE | | | |
| White | 72.58% | 83.34% | 72.41% |
| Black | 6.88% | 0.50% | 12.61% |
| Asian | 2.43% | 0.54% | 4.75% |
| American Indian | 0.89% | 0.32% | 0.95% |
| Other | 17.23% | 15.30% | 9.28% |
| Hispanic | 12.08% | 14.06% | 16.35% |
| Non-Hispanic | 87.92% | 85.94% | 83.65% |
| FAMILY | | | |
| Married, w/children | 29.55% | 27.46% | 30.42% |
| Married, no children | 34.98% | 39.51% | 42.46% |
| Single, w/children | 18.79% | 17.79% | 14.39% |
| Single, no children | 16.67% | 15.25% | 12.73% |
| Divorced | 12.59% | 9.26% | 10.62% |
| Separated | 7.34% | 9.42% | 4.97% |
| Widowed | 5.90% | 8.31% | 6.14% |
| Now Married | 40.78% | 46.26% | 46.32% |
| Never Married | 33.39% | 26.75% | 31.95% |
