| PEOPLE | Bellingham | Helena | United States |
| Population | 80,885 | 28,190 | 308,035,306 |
| Pop. Density | 2,987 | 1,724 | 87 |
| Pop. Change | 18.19% | 9.22% | 8.07% |
| Median Age | 31.5 | 40.3 | 37.3 |
| Households | 34,671 | 12,780 | 116,716,292 |
| Household Size | 2.2 | 2.09 | 2.58 |
| Male Population | 48.81% | 48.00% | 49.27% |
| Female Population | 51.19% | 52.00% | 50.96% |
| Married Population | 33.84% | 41.95% | 47.02% |
| Single Population | 66.16% | 58.05% | 52.98% |
| ESTIMATED TOTAL POPULATION BY AGE | | | |
| Age 0 to 4 | 4.62% | 5.88% | 6.56% |
| Age 5 to 9 | 4.30% | 5.47% | 6.61% |
| Age 10 to 14 | 4.13% | 5.30% | 6.71% |
| Age 15 to 17 | 2.52% | 3.42% | 4.21% |
| Age 18 to 20 | 6.35% | 3.29% | 2.95% |
| Age 21 to 24 | 17.23% | 8.26% | 7.01% |
| Age 25 to 34 | 15.32% | 12.92% | 13.33% |
| Age 35 to 44 | 10.66% | 10.46% | 13.33% |
| Age 45 to 49 | 10.84% | 14.50% | 14.61% |
| Age 50 to 54 | 10.84% | 14.50% | 14.61% |
| Age 55 to 59 | 11.20% | 14.92% | 11.84% |
| Age 60 to 64 | 11.20% | 14.92% | 11.84% |
| Age 65 to 74 | 6.10% | 7.53% | 7.05% |
| Age 75 to 84 | 4.21% | 4.85% | 4.24% |
| Age 85 and over | 2.53% | 3.20% | 1.78% |
| RACE | | | |
| White | 84.88% | 93.34% | 72.41% |
| Black | 1.32% | 0.42% | 12.61% |
| Asian | 5.11% | 0.73% | 4.75% |
| American Indian | 1.35% | 2.30% | 0.95% |
| Other | 7.35% | 3.21% | 9.28% |
| Hispanic | 2.04% | 3.26% | 16.35% |
| Non-Hispanic | 97.96% | 96.74% | 83.65% |
| FAMILY | | | |
| Married, w/children | 26.65% | 25.39% | 30.42% |
| Married, no children | 46.77% | 47.59% | 42.46% |
| Single, w/children | 15.52% | 17.74% | 14.39% |
| Single, no children | 11.06% | 9.28% | 12.73% |
| Divorced | 11.20% | 16.37% | 10.62% |
| Separated | 4.51% | 4.06% | 4.97% |
| Widowed | 5.16% | 6.86% | 6.14% |
| Now Married | 34.12% | 42.09% | 46.32% |
| Never Married | 45.01% | 30.63% | 31.95% |
