| PEOPLE | Stillwater | Boulder | United States |
| Population | 45,688 | 97,385 | 308,035,306 |
| Pop. Density | 1,547 | 3,948 | 87 |
| Pop. Change | 16.92% | 2.41% | 8.07% |
| Median Age | 24.2 | 28.8 | 37.3 |
| Households | 17,941 | 41,302 | 116,716,292 |
| Household Size | 2.16 | 2.16 | 2.58 |
| Male Population | 50.56% | 51.35% | 49.27% |
| Female Population | 49.44% | 48.65% | 50.96% |
| Married Population | 31.59% | 29.68% | 47.02% |
| Single Population | 68.41% | 70.32% | 52.98% |
| ESTIMATED TOTAL POPULATION BY AGE | | | |
| Age 0 to 4 | 5.02% | 4.06% | 6.56% |
| Age 5 to 9 | 4.24% | 3.97% | 6.61% |
| Age 10 to 14 | 3.48% | 3.65% | 6.71% |
| Age 15 to 17 | 2.03% | 2.21% | 4.21% |
| Age 18 to 20 | 10.21% | 8.76% | 2.95% |
| Age 21 to 24 | 28.84% | 20.35% | 7.01% |
| Age 25 to 34 | 15.69% | 15.99% | 13.33% |
| Age 35 to 44 | 7.79% | 11.73% | 13.33% |
| Age 45 to 49 | 7.86% | 10.79% | 14.61% |
| Age 50 to 54 | 7.86% | 10.79% | 14.61% |
| Age 55 to 59 | 6.70% | 9.57% | 11.84% |
| Age 60 to 64 | 6.70% | 9.57% | 11.84% |
| Age 65 to 74 | 4.08% | 4.60% | 7.05% |
| Age 75 to 84 | 2.70% | 2.73% | 4.24% |
| Age 85 and over | 1.36% | 1.61% | 1.78% |
| RACE | | | |
| White | 79.50% | 88.00% | 72.41% |
| Black | 4.71% | 0.90% | 12.61% |
| Asian | 5.56% | 4.73% | 4.75% |
| American Indian | 3.93% | 0.44% | 0.95% |
| Other | 6.30% | 5.93% | 9.28% |
| Hispanic | 34.44% | 12.31% | 16.35% |
| Non-Hispanic | 65.56% | 87.69% | 83.65% |
| FAMILY | | | |
| Married, w/children | 29.41% | 34.21% | 30.42% |
| Married, no children | 43.61% | 45.48% | 42.46% |
| Single, w/children | 14.94% | 11.18% | 14.39% |
| Single, no children | 12.05% | 9.13% | 12.73% |
| Divorced | 9.19% | 10.00% | 10.62% |
| Separated | 4.09% | 4.73% | 4.97% |
| Widowed | 3.72% | 3.36% | 6.14% |
| Now Married | 31.92% | 29.69% | 46.32% |
| Never Married | 51.08% | 52.23% | 31.95% |
