| | Ulm, MT | West Kootenai, MT | United States |
| Population | 790 | 55 | 329,725,481 |
| Female Population | 37.6% | 49.1% | 50.5% |
| Male Population | 62.4% | 50.9% | 49.5% |
| Median Age | 34.7 | 69.7 | 38.4 |
| space3 | | | |
| Population - 2010 | 613 | 337 | 309,327,143 |
| Population - 2000 | 750 | 338 | 285,036,114 |
| Population - 1990 | 453 | 196 | 251,960,433 |
| Pop. 2000 to Now | -37.6% | -84.6% | 15.6% |
| Pop. 1990 to Now | 3.3% | -73.5% | 30.8% |
| space4 | | | |
| Population Density | 39.0 | 3.4 | 93.4 |
| Land Area | 20.2 | 16.1 | 3,531,905.4 |
| Water Area | 0.6 | 0.1 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Ulm, MT | West Kootenai, MT | United States |
| Age 0 to 4 | 0.4% | 0.0% | 5.9% |
| Age 5 to 9 | 18.1% | 0.0% | 6.1% |
| Age 10 to 14 | 6.1% | 0.0% | 6.6% |
| Age 15 to 17 | 5.3% | 0.0% | 3.9% |
| Age 18 to 20 | 4.1% | 0.0% | 4.0% |
| Age 21 to 24 | 2.2% | 0.0% | 5.2% |
| Age 25 to 34 | 15.8% | 0.0% | 13.8% |
| Age 35 to 44 | 6.8% | 0.0% | 12.9% |
| Age 45 to 54 | 11.6% | 0.0% | 12.6% |
| Age 55 to 59 | 2.8% | 0.0% | 6.7% |
| Age 60 to 64 | 10.1% | 0.0% | 6.3% |
| Age 65 to 74 | 12.4% | 83.6% | 9.6% |
| Age 75 to 84 | 4.3% | 16.4% | 4.5% |
| Age 85 and over | 0.0% | 0.0% | 1.9% |
| space1 | | | |
| Race | | | |
| | Ulm, MT | West Kootenai, MT | United States |
| White | 96.6% | 100.0% | 59.4% |
| Black | 0.0% | 0.0% | 12.2% |
| Asian | 0.0% | 0.0% | 5.6% |
| Native American | 0.9% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.5% | 0.0% | 0.4% |
| Two or More Races | 1.4% | 0.0% | 3.2% |
| Hispanic | 0.6% | 0.0% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Ulm, MT | West Kootenai, MT | United States |
| Married Population | 65.8% | 40.0% | 49.8% |
| Currently Married | 65.8% | 40.0% | 48.0% |
| Married but Separated | 0.0% | 0.0% | 1.8% |
| Single Population | 34.2% | 60.0% | 50.2% |
| Never Married | 24.8% | 32.7% | 33.8% |
| Divorced | 4.9% | 0.0% | 10.8% |
| Widowed | 4.5% | 27.3% | 5.6% |
| space5 | | | |
| Household Size | 3.00 | 1.31 | 2.60 |
| Households | 263 | 42 | 124,010,992 |
| Family Households | 211 | 9 | 80,755,759 |
| Married couple, w/children | 44.6% | 0.0% | 30.5% |
| Married couple, no children | 49.8% | 100.0% | 42.9% |
| Non Family Households | 52 | 33 | 43,255,233 |
| Single householder, w/children | 4.7% | 0.0% | 15.8% |
| Single householder, no children | 0.9% | 0.0% | 10.8% |