| | Joliet, MT | Fort Sumner, NM | United States |
| Population | 592 | 1,364 | 329,725,481 |
| Female Population | 47.0% | 47.3% | 50.5% |
| Male Population | 53.0% | 52.7% | 49.5% |
| Median Age | 40.8 | 20.9 | 38.4 |
| space3 | | | |
| Population - 2010 | 584 | 1,039 | 309,327,143 |
| Population - 2000 | 575 | 1,249 | 285,036,114 |
| Population - 1990 | 522 | 1,269 | 251,960,433 |
| Pop. 2000 to Now | 15.8% | -31.6% | 15.6% |
| Pop. 1990 to Now | 27.6% | -32.7% | 30.8% |
| space4 | | | |
| Population Density | 2,160.6 | 411.5 | 93.4 |
| Land Area | 0.3 | 3.3 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Joliet, MT | Fort Sumner, NM | United States |
| Age 0 to 4 | 2.5% | 19.7% | 5.9% |
| Age 5 to 9 | 9.6% | 12.6% | 6.1% |
| Age 10 to 14 | 5.4% | 7.6% | 6.6% |
| Age 15 to 17 | 4.1% | 4.6% | 3.9% |
| Age 18 to 20 | 4.7% | 6.2% | 4.0% |
| Age 21 to 24 | 2.7% | 1.9% | 5.2% |
| Age 25 to 34 | 13.2% | 15.5% | 13.8% |
| Age 35 to 44 | 12.7% | 9.2% | 12.9% |
| Age 45 to 54 | 10.0% | 1.9% | 12.6% |
| Age 55 to 59 | 2.9% | 3.1% | 6.7% |
| Age 60 to 64 | 7.9% | 4.4% | 6.3% |
| Age 65 to 74 | 13.9% | 7.6% | 9.6% |
| Age 75 to 84 | 7.6% | 5.2% | 4.5% |
| Age 85 and over | 2.9% | 0.4% | 1.9% |
| space1 | | | |
| Race | | | |
| | Joliet, MT | Fort Sumner, NM | United States |
| White | 93.6% | 22.5% | 59.4% |
| Black | 0.0% | 3.2% | 12.2% |
| Asian | 0.0% | 0.0% | 5.6% |
| Native American | 1.2% | 0.1% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 2.4% | 0.5% | 3.2% |
| Hispanic | 2.9% | 73.6% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Joliet, MT | Fort Sumner, NM | United States |
| Married Population | 65.0% | 32.4% | 49.8% |
| Currently Married | 63.3% | 27.0% | 48.0% |
| Married but Separated | 1.6% | 5.4% | 1.8% |
| Single Population | 35.0% | 67.6% | 50.2% |
| Never Married | 20.9% | 49.3% | 33.8% |
| Divorced | 8.6% | 7.7% | 10.8% |
| Widowed | 5.5% | 10.6% | 5.6% |
| space5 | | | |
| Household Size | 2.40 | 3.85 | 2.60 |
| Households | 247 | 350 | 124,010,992 |
| Family Households | 158 | 183 | 80,755,759 |
| Married couple, w/children | 20.9% | 32.2% | 30.5% |
| Married couple, no children | 65.2% | 20.2% | 42.9% |
| Non Family Households | 89 | 167 | 43,255,233 |
| Single householder, w/children | 10.1% | 47.5% | 15.8% |
| Single householder, no children | 3.8% | 0.0% | 10.8% |