| | Boulder, MT | Tennessee Ridge, TN | United States |
| Population | 1,033 | 1,281 | 329,725,481 |
| Female Population | 49.1% | 51.5% | 50.5% |
| Male Population | 50.9% | 48.5% | 49.5% |
| Median Age | 40.2 | 44.4 | 38.4 |
| space3 | | | |
| Population - 2010 | 1,180 | 1,368 | 309,327,143 |
| Population - 2000 | 1,300 | 1,334 | 285,036,114 |
| Population - 1990 | 1,316 | 1,271 | 251,960,433 |
| Pop. 2000 to Now | -0.7% | -0.3% | 15.6% |
| Pop. 1990 to Now | -1.9% | 4.6% | 30.8% |
| space4 | | | |
| Population Density | 919.0 | 341.1 | 93.4 |
| Land Area | 1.1 | 3.8 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Boulder, MT | Tennessee Ridge, TN | United States |
| Age 0 to 4 | 9.8% | 6.2% | 5.9% |
| Age 5 to 9 | 10.0% | 8.4% | 6.1% |
| Age 10 to 14 | 2.7% | 4.8% | 6.6% |
| Age 15 to 17 | 1.6% | 2.9% | 3.9% |
| Age 18 to 20 | 3.6% | 4.1% | 4.0% |
| Age 21 to 24 | 8.2% | 4.1% | 5.2% |
| Age 25 to 34 | 10.1% | 10.5% | 13.8% |
| Age 35 to 44 | 15.5% | 9.7% | 12.9% |
| Age 45 to 54 | 10.8% | 12.9% | 12.6% |
| Age 55 to 59 | 6.8% | 5.4% | 6.7% |
| Age 60 to 64 | 7.2% | 5.8% | 6.3% |
| Age 65 to 74 | 7.4% | 13.9% | 9.6% |
| Age 75 to 84 | 4.6% | 10.8% | 4.5% |
| Age 85 and over | 1.8% | 0.6% | 1.9% |
| space1 | | | |
| Race | | | |
| | Boulder, MT | Tennessee Ridge, TN | United States |
| White | 89.1% | 92.6% | 59.4% |
| Black | 0.0% | 0.5% | 12.2% |
| Asian | 0.0% | 0.0% | 5.6% |
| Native American | 5.3% | 0.9% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 2.8% | 4.6% | 3.2% |
| Hispanic | 2.8% | 1.5% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Boulder, MT | Tennessee Ridge, TN | United States |
| Married Population | 40.3% | 45.3% | 49.8% |
| Currently Married | 36.6% | 45.3% | 48.0% |
| Married but Separated | 3.7% | 0.0% | 1.8% |
| Single Population | 59.7% | 54.7% | 50.2% |
| Never Married | 33.8% | 29.3% | 33.8% |
| Divorced | 21.6% | 12.2% | 10.8% |
| Widowed | 4.2% | 13.2% | 5.6% |
| space5 | | | |
| Household Size | 2.44 | 2.73 | 2.60 |
| Households | 378 | 462 | 124,010,992 |
| Family Households | 203 | 280 | 80,755,759 |
| Married couple, w/children | 34.0% | 22.1% | 30.5% |
| Married couple, no children | 36.9% | 54.6% | 42.9% |
| Non Family Households | 175 | 182 | 43,255,233 |
| Single householder, w/children | 21.7% | 9.3% | 15.8% |
| Single householder, no children | 7.4% | 13.9% | 10.8% |