| | Bigfork, MT | Sulphur Springs, TX | United States |
| Population | 4,683 | 15,825 | 329,725,481 |
| Female Population | 52.8% | 52.2% | 50.5% |
| Male Population | 47.2% | 47.8% | 49.5% |
| Median Age | 54.7 | 37.8 | 38.4 |
| space3 | | | |
| Population - 2010 | 4,401 | 15,450 | 309,327,143 |
| Population - 2000 | 1,421 | 14,551 | 285,036,114 |
| Population - 1990 | 2,723 | 14,062 | 251,960,433 |
| Pop. 2000 to Now | 272.5% | 11.8% | 15.6% |
| Pop. 1990 to Now | 94.4% | 15.7% | 30.8% |
| space4 | | | |
| Population Density | 149.8 | 781.8 | 93.4 |
| Land Area | 31.3 | 20.2 | 3,531,905.4 |
| Water Area | 6.1 | 3.4 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Bigfork, MT | Sulphur Springs, TX | United States |
| Age 0 to 4 | 1.7% | 6.0% | 5.9% |
| Age 5 to 9 | 3.5% | 7.2% | 6.1% |
| Age 10 to 14 | 4.2% | 6.8% | 6.6% |
| Age 15 to 17 | 5.0% | 4.3% | 3.9% |
| Age 18 to 20 | 2.8% | 3.2% | 4.0% |
| Age 21 to 24 | 5.7% | 7.2% | 5.2% |
| Age 25 to 34 | 9.2% | 11.7% | 13.8% |
| Age 35 to 44 | 7.0% | 10.9% | 12.9% |
| Age 45 to 54 | 11.3% | 14.3% | 12.6% |
| Age 55 to 59 | 10.5% | 5.0% | 6.7% |
| Age 60 to 64 | 8.8% | 5.7% | 6.3% |
| Age 65 to 74 | 17.4% | 10.5% | 9.6% |
| Age 75 to 84 | 8.8% | 4.8% | 4.5% |
| Age 85 and over | 4.1% | 2.3% | 1.9% |
| space1 | | | |
| Race | | | |
| | Bigfork, MT | Sulphur Springs, TX | United States |
| White | 86.0% | 65.6% | 59.4% |
| Black | 0.1% | 12.7% | 12.2% |
| Asian | 0.1% | 1.0% | 5.6% |
| Native American | 0.2% | 0.2% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.1% | 0.2% |
| Other | 1.1% | 0.3% | 0.4% |
| Two or More Races | 1.8% | 2.2% | 3.2% |
| Hispanic | 10.6% | 17.9% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Bigfork, MT | Sulphur Springs, TX | United States |
| Married Population | 54.1% | 48.1% | 49.8% |
| Currently Married | 53.7% | 45.2% | 48.0% |
| Married but Separated | 0.4% | 2.9% | 1.8% |
| Single Population | 45.9% | 51.9% | 50.2% |
| Never Married | 24.1% | 27.6% | 33.8% |
| Divorced | 11.4% | 15.9% | 10.8% |
| Widowed | 10.4% | 8.3% | 5.6% |
| space5 | | | |
| Household Size | 2.15 | 2.52 | 2.60 |
| Households | 2,152 | 6,142 | 124,010,992 |
| Family Households | 1,220 | 3,855 | 80,755,759 |
| Married couple, w/children | 23.9% | 32.6% | 30.5% |
| Married couple, no children | 63.3% | 34.2% | 42.9% |
| Non Family Households | 932 | 2,287 | 43,255,233 |
| Single householder, w/children | 4.3% | 18.6% | 15.8% |
| Single householder, no children | 8.4% | 14.6% | 10.8% |