| PEOPLE | Ellicott City | Catonsville | United States |
| Population | 65,834 | 41,567 | 308,035,306 |
| Pop. Density | 2,198 | 2,977 | 87 |
| Pop. Change | 24.31% | 6.48% | 8.07% |
| Median Age | 40.7 | 39.6 | 37.3 |
| Households | 23,734 | 15,698 | 116,716,292 |
| Household Size | 2.76 | 2.34 | 2.58 |
| Male Population | 48.71% | 47.82% | 49.27% |
| Female Population | 51.29% | 52.18% | 50.96% |
| Married Population | 59.37% | 40.71% | 47.02% |
| Single Population | 40.63% | 59.29% | 52.98% |
| ESTIMATED TOTAL POPULATION BY AGE | | | |
| Age 0 to 4 | 5.61% | 4.93% | 6.56% |
| Age 5 to 9 | 7.47% | 5.19% | 6.61% |
| Age 10 to 14 | 8.07% | 5.24% | 6.71% |
| Age 15 to 17 | 5.30% | 3.46% | 4.21% |
| Age 18 to 20 | 2.01% | 5.85% | 2.95% |
| Age 21 to 24 | 4.51% | 9.22% | 7.01% |
| Age 25 to 34 | 9.39% | 11.09% | 13.33% |
| Age 35 to 44 | 14.66% | 11.57% | 13.33% |
| Age 45 to 49 | 17.73% | 14.49% | 14.61% |
| Age 50 to 54 | 17.73% | 14.49% | 14.61% |
| Age 55 to 59 | 13.20% | 11.72% | 11.84% |
| Age 60 to 64 | 13.20% | 11.72% | 11.84% |
| Age 65 to 74 | 6.71% | 6.11% | 7.05% |
| Age 75 to 84 | 3.88% | 6.07% | 4.24% |
| Age 85 and over | 1.46% | 5.06% | 1.78% |
| RACE | | | |
| White | 64.48% | 75.25% | 72.41% |
| Black | 8.48% | 14.54% | 12.61% |
| Asian | 22.87% | 6.29% | 4.75% |
| American Indian | 0.20% | 0.28% | 0.95% |
| Other | 3.96% | 3.64% | 9.28% |
| Hispanic | 3.24% | 2.91% | 16.35% |
| Non-Hispanic | 96.76% | 97.09% | 83.65% |
| FAMILY | | | |
| Married, w/children | 43.33% | 32.11% | 30.42% |
| Married, no children | 41.96% | 44.76% | 42.46% |
| Single, w/children | 7.75% | 10.51% | 14.39% |
| Single, no children | 6.97% | 12.61% | 12.73% |
| Divorced | 5.74% | 8.20% | 10.62% |
| Separated | 4.00% | 5.66% | 4.97% |
| Widowed | 4.38% | 10.75% | 6.14% |
| Now Married | 59.93% | 41.49% | 46.32% |
| Never Married | 25.95% | 33.91% | 31.95% |
