| PEOPLE | Southlake | Columbia | United States |
| Population | 26,575 | 99,615 | 308,035,306 |
| Pop. Density | 1,215 | 3,120 | 87 |
| Pop. Change | 28.73% | 6.48% | 8.07% |
| Median Age | 40.8 | 37.4 | 37.3 |
| Households | 8,193 | 39,562 | 116,716,292 |
| Household Size | 3.23 | 2.51 | 2.58 |
| Male Population | 50.10% | 48.08% | 49.27% |
| Female Population | 49.90% | 51.92% | 50.96% |
| Married Population | 72.53% | 52.67% | 47.02% |
| Single Population | 27.47% | 47.33% | 52.98% |
| ESTIMATED TOTAL POPULATION BY AGE | | | |
| Age 0 to 4 | 5.20% | 6.39% | 6.56% |
| Age 5 to 9 | 9.45% | 6.54% | 6.61% |
| Age 10 to 14 | 11.99% | 6.78% | 6.71% |
| Age 15 to 17 | 7.60% | 4.29% | 4.21% |
| Age 18 to 20 | 2.45% | 2.05% | 2.95% |
| Age 21 to 24 | 2.35% | 5.51% | 7.01% |
| Age 25 to 34 | 3.62% | 14.99% | 13.33% |
| Age 35 to 44 | 15.16% | 14.66% | 13.33% |
| Age 45 to 49 | 23.90% | 15.41% | 14.61% |
| Age 50 to 54 | 23.90% | 15.41% | 14.61% |
| Age 55 to 59 | 12.40% | 12.54% | 11.84% |
| Age 60 to 64 | 12.40% | 12.54% | 11.84% |
| Age 65 to 74 | 3.85% | 6.70% | 7.05% |
| Age 75 to 84 | 1.41% | 2.86% | 4.24% |
| Age 85 and over | 0.61% | 1.28% | 1.78% |
| RACE | | | |
| White | 88.26% | 55.54% | 72.41% |
| Black | 2.06% | 25.33% | 12.61% |
| Asian | 6.23% | 11.43% | 4.75% |
| American Indian | 0.35% | 0.39% | 0.95% |
| Other | 3.11% | 7.31% | 9.28% |
| Hispanic | 8.22% | 6.43% | 16.35% |
| Non-Hispanic | 91.78% | 93.57% | 83.65% |
| FAMILY | | | |
| Married, w/children | 55.40% | 34.43% | 30.42% |
| Married, no children | 37.83% | 41.47% | 42.46% |
| Single, w/children | 4.57% | 13.51% | 14.39% |
| Single, no children | 2.20% | 10.59% | 12.73% |
| Divorced | 4.23% | 8.36% | 10.62% |
| Separated | 1.06% | 5.24% | 4.97% |
| Widowed | 1.57% | 4.24% | 6.14% |
| Now Married | 71.22% | 51.86% | 46.32% |
| Never Married | 21.93% | 30.29% | 31.95% |
