| | Lolo, MT | Kellogg, ID | United States |
| Population | 4,338 | 2,255 | 329,725,481 |
| Female Population | 47.8% | 50.9% | 50.5% |
| Male Population | 52.2% | 49.1% | 49.5% |
| Median Age | 32.1 | 34.4 | 38.4 |
| space3 | | | |
| Population - 2010 | 3,081 | 2,135 | 309,327,143 |
| Population - 2000 | 3,388 | 2,395 | 285,036,114 |
| Population - 1990 | 2,746 | 2,591 | 251,960,433 |
| Pop. 2000 to Now | 10.7% | -11.1% | 15.6% |
| Pop. 1990 to Now | 36.6% | -17.8% | 30.8% |
| space4 | | | |
| Population Density | 458.5 | 567.4 | 93.4 |
| Land Area | 9.5 | 4.0 | 3,531,905.4 |
| Water Area | 0.2 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Lolo, MT | Kellogg, ID | United States |
| Age 0 to 4 | 11.9% | 9.7% | 5.9% |
| Age 5 to 9 | 5.1% | 6.3% | 6.1% |
| Age 10 to 14 | 8.5% | 4.1% | 6.6% |
| Age 15 to 17 | 2.4% | 2.4% | 3.9% |
| Age 18 to 20 | 0.0% | 6.0% | 4.0% |
| Age 21 to 24 | 6.9% | 6.9% | 5.2% |
| Age 25 to 34 | 20.5% | 16.9% | 13.8% |
| Age 35 to 44 | 12.6% | 9.8% | 12.9% |
| Age 45 to 54 | 10.3% | 9.5% | 12.6% |
| Age 55 to 59 | 5.8% | 7.4% | 6.7% |
| Age 60 to 64 | 4.2% | 4.3% | 6.3% |
| Age 65 to 74 | 6.5% | 9.8% | 9.6% |
| Age 75 to 84 | 5.4% | 3.1% | 4.5% |
| Age 85 and over | 0.0% | 3.8% | 1.9% |
| space1 | | | |
| Race | | | |
| | Lolo, MT | Kellogg, ID | United States |
| White | 94.7% | 89.2% | 59.4% |
| Black | 0.3% | 0.0% | 12.2% |
| Asian | 1.5% | 0.0% | 5.6% |
| Native American | 0.0% | 1.8% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 1.9% | 3.5% | 3.2% |
| Hispanic | 1.6% | 5.5% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Lolo, MT | Kellogg, ID | United States |
| Married Population | 60.2% | 43.2% | 49.8% |
| Currently Married | 60.2% | 41.5% | 48.0% |
| Married but Separated | 0.0% | 1.6% | 1.8% |
| Single Population | 39.8% | 56.9% | 50.2% |
| Never Married | 23.9% | 32.6% | 33.8% |
| Divorced | 12.6% | 17.9% | 10.8% |
| Widowed | 3.3% | 6.4% | 5.6% |
| space5 | | | |
| Household Size | 2.43 | 2.33 | 2.60 |
| Households | 1,785 | 944 | 124,010,992 |
| Family Households | 1,207 | 496 | 80,755,759 |
| Married couple, w/children | 35.1% | 23.8% | 30.5% |
| Married couple, no children | 45.2% | 45.6% | 42.9% |
| Non Family Households | 578 | 448 | 43,255,233 |
| Single householder, w/children | 13.0% | 16.5% | 15.8% |
| Single householder, no children | 6.6% | 14.1% | 10.8% |