| PEOPLE | San Marcos | Milford | United States |
| Population | 44,894 | 6,709 | 308,035,306 |
| Pop. Density | 1,486 | 1,800 | 87 |
| Pop. Change | 38.62% | 4.39% | 8.07% |
| Median Age | 23.4 | 43.1 | 37.3 |
| Households | 17,031 | 3,019 | 116,716,292 |
| Household Size | 2.28 | 2.14 | 2.58 |
| Male Population | 49.68% | 45.24% | 49.27% |
| Female Population | 50.32% | 54.76% | 50.96% |
| Married Population | 20.96% | 46.92% | 47.02% |
| Single Population | 79.04% | 53.08% | 52.98% |
| ESTIMATED TOTAL POPULATION BY AGE | | | |
| Age 0 to 4 | 4.42% | 5.68% | 6.56% |
| Age 5 to 9 | 3.83% | 6.74% | 6.61% |
| Age 10 to 14 | 3.68% | 6.01% | 6.71% |
| Age 15 to 17 | 2.30% | 2.98% | 4.21% |
| Age 18 to 20 | 11.53% | 1.85% | 2.95% |
| Age 21 to 24 | 33.22% | 5.05% | 7.01% |
| Age 25 to 34 | 15.22% | 11.27% | 13.33% |
| Age 35 to 44 | 7.34% | 13.04% | 13.33% |
| Age 45 to 49 | 6.30% | 14.01% | 14.61% |
| Age 50 to 54 | 6.30% | 14.01% | 14.61% |
| Age 55 to 59 | 5.48% | 11.51% | 11.84% |
| Age 60 to 64 | 5.48% | 11.51% | 11.84% |
| Age 65 to 74 | 3.18% | 8.08% | 7.05% |
| Age 75 to 84 | 2.27% | 7.75% | 4.24% |
| Age 85 and over | 1.22% | 6.04% | 1.78% |
| RACE | | | |
| White | 78.45% | 94.60% | 72.41% |
| Black | 5.49% | 2.33% | 12.61% |
| Asian | 1.55% | 0.85% | 4.75% |
| American Indian | 0.85% | 0.13% | 0.95% |
| Other | 13.65% | 2.09% | 9.28% |
| Hispanic | 1.19% | 3.69% | 16.35% |
| Non-Hispanic | 98.81% | 96.31% | 83.65% |
| FAMILY | | | |
| Married, w/children | 24.70% | 27.54% | 30.42% |
| Married, no children | 35.27% | 41.54% | 42.46% |
| Single, w/children | 19.41% | 16.67% | 14.39% |
| Single, no children | 20.62% | 14.25% | 12.73% |
| Divorced | 6.36% | 14.40% | 10.62% |
| Separated | 3.36% | 3.35% | 4.97% |
| Widowed | 3.33% | 12.46% | 6.14% |
| Now Married | 21.29% | 47.17% | 46.32% |
| Never Married | 65.66% | 22.61% | 31.95% |
