| | Fort Benton, MT | Lady Lake, FL | United States |
| Population | 1,396 | 15,683 | 329,725,481 |
| Female Population | 48.4% | 52.4% | 50.5% |
| Male Population | 51.6% | 47.6% | 49.5% |
| Median Age | 38.4 | 65.9 | 38.4 |
| space3 | | | |
| Population - 2010 | 1,464 | 14,043 | 309,327,143 |
| Population - 2000 | 1,594 | 11,828 | 285,036,114 |
| Population - 1990 | 1,660 | 8,071 | 251,960,433 |
| Pop. 2000 to Now | -9.5% | 36.8% | 15.6% |
| Pop. 1990 to Now | -13.1% | 100.5% | 30.8% |
| space4 | | | |
| Population Density | 608.8 | 1,912.1 | 93.4 |
| Land Area | 2.3 | 8.2 | 3,531,905.4 |
| Water Area | 0.0 | 0.3 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Fort Benton, MT | Lady Lake, FL | United States |
| Age 0 to 4 | 4.6% | 2.4% | 5.9% |
| Age 5 to 9 | 9.2% | 3.6% | 6.1% |
| Age 10 to 14 | 6.9% | 2.5% | 6.6% |
| Age 15 to 17 | 5.6% | 1.7% | 3.9% |
| Age 18 to 20 | 0.0% | 1.5% | 4.0% |
| Age 21 to 24 | 5.4% | 3.5% | 5.2% |
| Age 25 to 34 | 11.6% | 6.6% | 13.8% |
| Age 35 to 44 | 15.0% | 4.6% | 12.9% |
| Age 45 to 54 | 8.2% | 6.0% | 12.6% |
| Age 55 to 59 | 3.0% | 6.5% | 6.7% |
| Age 60 to 64 | 6.7% | 9.4% | 6.3% |
| Age 65 to 74 | 12.0% | 22.2% | 9.6% |
| Age 75 to 84 | 7.9% | 21.3% | 4.5% |
| Age 85 and over | 3.9% | 8.1% | 1.9% |
| space1 | | | |
| Race | | | |
| | Fort Benton, MT | Lady Lake, FL | United States |
| White | 94.6% | 85.4% | 59.4% |
| Black | 0.0% | 3.9% | 12.2% |
| Asian | 0.2% | 2.2% | 5.6% |
| Native American | 0.4% | 0.3% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 1.5% | 0.4% |
| Two or More Races | 2.8% | 1.1% | 3.2% |
| Hispanic | 1.9% | 5.6% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Fort Benton, MT | Lady Lake, FL | United States |
| Married Population | 51.4% | 53.9% | 49.8% |
| Currently Married | 48.9% | 52.2% | 48.0% |
| Married but Separated | 2.5% | 1.7% | 1.8% |
| Single Population | 48.6% | 46.1% | 50.2% |
| Never Married | 29.7% | 17.0% | 33.8% |
| Divorced | 5.5% | 17.4% | 10.8% |
| Widowed | 13.4% | 11.7% | 5.6% |
| space5 | | | |
| Household Size | 2.46 | 1.94 | 2.60 |
| Households | 556 | 8,010 | 124,010,992 |
| Family Households | 320 | 4,585 | 80,755,759 |
| Married couple, w/children | 41.3% | 6.0% | 30.5% |
| Married couple, no children | 41.3% | 74.0% | 42.9% |
| Non Family Households | 236 | 3,425 | 43,255,233 |
| Single householder, w/children | 14.4% | 10.7% | 15.8% |
| Single householder, no children | 3.1% | 9.4% | 10.8% |