| | Livingston, MT | Gallatin Gateway, MT | United States |
| Population | 8,110 | 825 | 329,725,481 |
| Female Population | 50.6% | 48.4% | 50.5% |
| Male Population | 49.4% | 51.6% | 49.5% |
| Median Age | 41.6 | 45.4 | 38.4 |
| space3 | | | |
| Population - 2010 | 7,031 | 911 | 309,327,143 |
| Population - 2000 | 6,851 | 558 | 285,036,114 |
| Population - 1990 | 6,701 | 426 | 251,960,433 |
| Pop. 2000 to Now | 15.3% | 84.8% | 15.6% |
| Pop. 1990 to Now | 17.9% | 142.0% | 30.8% |
| space4 | | | |
| Population Density | 1,437.7 | 141.1 | 93.4 |
| Land Area | 5.6 | 5.8 | 3,531,905.4 |
| Water Area | 0.1 | 0.1 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Livingston, MT | Gallatin Gateway, MT | United States |
| Age 0 to 4 | 6.1% | 4.2% | 5.9% |
| Age 5 to 9 | 3.8% | 9.8% | 6.1% |
| Age 10 to 14 | 6.7% | 5.2% | 6.6% |
| Age 15 to 17 | 3.3% | 2.1% | 3.9% |
| Age 18 to 20 | 2.3% | 1.2% | 4.0% |
| Age 21 to 24 | 3.9% | 2.2% | 5.2% |
| Age 25 to 34 | 15.4% | 11.3% | 13.8% |
| Age 35 to 44 | 15.6% | 13.7% | 12.9% |
| Age 45 to 54 | 10.2% | 17.0% | 12.6% |
| Age 55 to 59 | 7.1% | 8.0% | 6.7% |
| Age 60 to 64 | 5.6% | 9.7% | 6.3% |
| Age 65 to 74 | 12.1% | 6.9% | 9.6% |
| Age 75 to 84 | 4.7% | 7.3% | 4.5% |
| Age 85 and over | 3.2% | 1.5% | 1.9% |
| space1 | | | |
| Race | | | |
| | Livingston, MT | Gallatin Gateway, MT | United States |
| White | 93.9% | 87.6% | 59.4% |
| Black | 0.5% | 0.0% | 12.2% |
| Asian | 0.3% | 0.6% | 5.6% |
| Native American | 0.1% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.2% | 0.0% | 0.4% |
| Two or More Races | 1.9% | 6.2% | 3.2% |
| Hispanic | 3.1% | 5.6% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Livingston, MT | Gallatin Gateway, MT | United States |
| Married Population | 41.6% | 58.3% | 49.8% |
| Currently Married | 41.3% | 57.7% | 48.0% |
| Married but Separated | 0.3% | 0.6% | 1.8% |
| Single Population | 58.4% | 41.7% | 50.2% |
| Never Married | 32.0% | 20.7% | 33.8% |
| Divorced | 19.5% | 14.1% | 10.8% |
| Widowed | 6.9% | 6.9% | 5.6% |
| space5 | | | |
| Household Size | 2.09 | 2.34 | 2.60 |
| Households | 3,824 | 353 | 124,010,992 |
| Family Households | 1,836 | 193 | 80,755,759 |
| Married couple, w/children | 26.5% | 32.1% | 30.5% |
| Married couple, no children | 47.2% | 59.6% | 42.9% |
| Non Family Households | 1,988 | 160 | 43,255,233 |
| Single householder, w/children | 19.3% | 4.7% | 15.8% |
| Single householder, no children | 7.0% | 3.6% | 10.8% |