| PEOPLE | Marietta | Denver | United States |
| Population | 56,579 | 600,158 | 308,035,306 |
| Pop. Density | 2,451 | 3,923 | 87 |
| Pop. Change | -3.76% | 8.88% | 8.07% |
| Median Age | 32.8 | 33.8 | 37.3 |
| Households | 23,065 | 263,107 | 116,716,292 |
| Household Size | 2.41 | 2.22 | 2.58 |
| Male Population | 48.94% | 50.00% | 49.27% |
| Female Population | 51.06% | 50.00% | 50.96% |
| Married Population | 33.95% | 36.72% | 47.02% |
| Single Population | 66.05% | 63.28% | 52.98% |
| ESTIMATED TOTAL POPULATION BY AGE | | | |
| Age 0 to 4 | 8.21% | 7.25% | 6.56% |
| Age 5 to 9 | 6.57% | 6.23% | 6.61% |
| Age 10 to 14 | 5.38% | 5.06% | 6.71% |
| Age 15 to 17 | 3.29% | 2.92% | 4.21% |
| Age 18 to 20 | 2.70% | 2.46% | 2.95% |
| Age 21 to 24 | 8.91% | 7.95% | 7.01% |
| Age 25 to 34 | 18.85% | 20.47% | 13.33% |
| Age 35 to 44 | 14.49% | 14.96% | 13.33% |
| Age 45 to 49 | 12.21% | 12.08% | 14.61% |
| Age 50 to 54 | 12.21% | 12.08% | 14.61% |
| Age 55 to 59 | 9.34% | 10.29% | 11.84% |
| Age 60 to 64 | 9.34% | 10.29% | 11.84% |
| Age 65 to 74 | 4.92% | 5.36% | 7.05% |
| Age 75 to 84 | 3.23% | 3.39% | 4.24% |
| Age 85 and over | 1.91% | 1.60% | 1.78% |
| RACE | | | |
| White | 52.68% | 68.93% | 72.41% |
| Black | 31.47% | 10.24% | 12.61% |
| Asian | 2.95% | 3.40% | 4.75% |
| American Indian | 0.47% | 1.37% | 0.95% |
| Other | 12.43% | 16.06% | 9.28% |
| Hispanic | 46.81% | 6.18% | 16.35% |
| Non-Hispanic | 53.19% | 93.82% | 83.65% |
| FAMILY | | | |
| Married, w/children | 28.76% | 30.29% | 30.42% |
| Married, no children | 34.09% | 38.30% | 42.46% |
| Single, w/children | 21.04% | 16.63% | 14.39% |
| Single, no children | 16.11% | 14.77% | 12.73% |
| Divorced | 12.36% | 13.56% | 10.62% |
| Separated | 10.15% | 6.38% | 4.97% |
| Widowed | 6.38% | 5.53% | 6.14% |
| Now Married | 33.78% | 37.00% | 46.32% |
| Never Married | 37.33% | 37.53% | 31.95% |
