| | Diamond, IL | Noxon, MT | United States |
| Population | 2,765 | 181 | 329,725,481 |
| Female Population | 50.2% | 39.8% | 50.5% |
| Male Population | 49.8% | 60.2% | 49.5% |
| Median Age | 37.4 | 47.8 | 38.4 |
| space3 | | | |
| Population - 2010 | 2,533 | 293 | 309,327,143 |
| Population - 2000 | 1,393 | 230 | 285,036,114 |
| Population - 1990 | 1,077 | 136 | 251,960,433 |
| Pop. 2000 to Now | 78.3% | 10.0% | 15.6% |
| Pop. 1990 to Now | 130.6% | 86.0% | 30.8% |
| space4 | | | |
| Population Density | 1,454.5 | 146.3 | 93.4 |
| Land Area | 1.9 | 1.2 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Diamond, IL | Noxon, MT | United States |
| Age 0 to 4 | 5.4% | 0.0% | 5.9% |
| Age 5 to 9 | 9.8% | 0.0% | 6.1% |
| Age 10 to 14 | 8.0% | 5.0% | 6.6% |
| Age 15 to 17 | 2.2% | 11.1% | 3.9% |
| Age 18 to 20 | 1.8% | 0.0% | 4.0% |
| Age 21 to 24 | 7.2% | 0.0% | 5.2% |
| Age 25 to 34 | 9.9% | 11.6% | 13.8% |
| Age 35 to 44 | 15.4% | 13.8% | 12.9% |
| Age 45 to 54 | 12.0% | 33.1% | 12.6% |
| Age 55 to 59 | 8.8% | 2.2% | 6.7% |
| Age 60 to 64 | 6.8% | 5.0% | 6.3% |
| Age 65 to 74 | 4.6% | 10.5% | 9.6% |
| Age 75 to 84 | 5.2% | 7.7% | 4.5% |
| Age 85 and over | 3.0% | 0.0% | 1.9% |
| space1 | | | |
| Race | | | |
| | Diamond, IL | Noxon, MT | United States |
| White | 94.9% | 95.0% | 59.4% |
| Black | 0.0% | 0.0% | 12.2% |
| Asian | 0.0% | 0.0% | 5.6% |
| Native American | 0.0% | 5.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.1% | 0.0% | 0.4% |
| Two or More Races | 0.7% | 0.0% | 3.2% |
| Hispanic | 4.3% | 0.0% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Diamond, IL | Noxon, MT | United States |
| Married Population | 49.2% | 39.0% | 49.8% |
| Currently Married | 48.0% | 39.0% | 48.0% |
| Married but Separated | 1.3% | 0.0% | 1.8% |
| Single Population | 50.8% | 61.0% | 50.2% |
| Never Married | 23.0% | 39.5% | 33.8% |
| Divorced | 18.0% | 14.5% | 10.8% |
| Widowed | 9.7% | 7.0% | 5.6% |
| space5 | | | |
| Household Size | 2.34 | 2.13 | 2.60 |
| Households | 1,180 | 85 | 124,010,992 |
| Family Households | 755 | 46 | 80,755,759 |
| Married couple, w/children | 26.6% | 8.7% | 30.5% |
| Married couple, no children | 38.3% | 67.4% | 42.9% |
| Non Family Households | 425 | 39 | 43,255,233 |
| Single householder, w/children | 26.1% | 23.9% | 15.8% |
| Single householder, no children | 9.0% | 0.0% | 10.8% |