| PEOPLE | Rosemont | Longmont | United States |
| Population | 4,202 | 86,270 | 308,035,306 |
| Pop. Density | 2,344 | 3,294 | 87 |
| Pop. Change | 0.30% | 19.11% | 8.07% |
| Median Age | 34.5 | 36.6 | 37.3 |
| Households | 1,652 | 33,252 | 116,716,292 |
| Household Size | 2.48 | 2.57 | 2.58 |
| Male Population | 52.05% | 49.26% | 49.27% |
| Female Population | 47.95% | 50.74% | 50.96% |
| Married Population | 43.46% | 53.91% | 47.02% |
| Single Population | 56.54% | 46.09% | 52.98% |
| ESTIMATED TOTAL POPULATION BY AGE | | | |
| Age 0 to 4 | 7.64% | 7.20% | 6.56% |
| Age 5 to 9 | 8.02% | 7.67% | 6.61% |
| Age 10 to 14 | 6.07% | 7.15% | 6.71% |
| Age 15 to 17 | 3.93% | 4.17% | 4.21% |
| Age 18 to 20 | 1.98% | 2.26% | 2.95% |
| Age 21 to 24 | 6.09% | 5.64% | 7.01% |
| Age 25 to 34 | 17.18% | 13.52% | 13.33% |
| Age 35 to 44 | 15.23% | 14.68% | 13.33% |
| Age 45 to 49 | 11.95% | 15.30% | 14.61% |
| Age 50 to 54 | 11.95% | 15.30% | 14.61% |
| Age 55 to 59 | 8.42% | 11.24% | 11.84% |
| Age 60 to 64 | 8.42% | 11.24% | 11.84% |
| Age 65 to 74 | 7.31% | 6.02% | 7.05% |
| Age 75 to 84 | 4.57% | 3.52% | 4.24% |
| Age 85 and over | 1.62% | 1.63% | 1.78% |
| RACE | | | |
| White | 78.03% | 83.32% | 72.41% |
| Black | 1.67% | 0.94% | 12.61% |
| Asian | 3.36% | 3.20% | 4.75% |
| American Indian | 1.12% | 1.00% | 0.95% |
| Other | 15.83% | 11.55% | 9.28% |
| Hispanic | 3.17% | 5.50% | 16.35% |
| Non-Hispanic | 96.83% | 94.50% | 83.65% |
| FAMILY | | | |
| Married, w/children | 38.59% | 35.35% | 30.42% |
| Married, no children | 33.83% | 41.28% | 42.46% |
| Single, w/children | 14.58% | 14.13% | 14.39% |
| Single, no children | 13.00% | 9.24% | 12.73% |
| Divorced | 9.70% | 12.68% | 10.62% |
| Separated | 6.69% | 3.44% | 4.97% |
| Widowed | 6.24% | 4.65% | 6.14% |
| Now Married | 43.11% | 53.12% | 46.32% |
| Never Married | 34.27% | 26.11% | 31.95% |
