| | Nevada, MO | Calhoun, MO | United States |
| Population | 8,111 | 326 | 329,725,481 |
| Female Population | 55.4% | 49.4% | 50.5% |
| Male Population | 44.6% | 50.6% | 49.5% |
| Median Age | 37.3 | 46.3 | 38.4 |
| space3 | | | |
| Population - 2010 | 8,388 | 468 | 309,327,143 |
| Population - 2000 | 8,607 | 491 | 285,036,114 |
| Population - 1990 | 8,597 | 450 | 251,960,433 |
| Pop. 2000 to Now | -4.8% | -7.1% | 15.6% |
| Pop. 1990 to Now | -4.7% | 1.3% | 30.8% |
| space4 | | | |
| Population Density | 902.7 | 331.3 | 93.4 |
| Land Area | 9.0 | 1.0 | 3,531,905.4 |
| Water Area | 0.1 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Nevada, MO | Calhoun, MO | United States |
| Age 0 to 4 | 5.3% | 1.8% | 5.9% |
| Age 5 to 9 | 7.7% | 10.4% | 6.1% |
| Age 10 to 14 | 6.7% | 4.3% | 6.6% |
| Age 15 to 17 | 3.7% | 2.8% | 3.9% |
| Age 18 to 20 | 5.3% | 4.3% | 4.0% |
| Age 21 to 24 | 6.2% | 1.5% | 5.2% |
| Age 25 to 34 | 12.0% | 14.4% | 13.8% |
| Age 35 to 44 | 12.0% | 8.9% | 12.9% |
| Age 45 to 54 | 8.9% | 6.4% | 12.6% |
| Age 55 to 59 | 4.9% | 7.1% | 6.7% |
| Age 60 to 64 | 8.0% | 12.6% | 6.3% |
| Age 65 to 74 | 9.9% | 16.0% | 9.6% |
| Age 75 to 84 | 6.7% | 8.3% | 4.5% |
| Age 85 and over | 2.7% | 1.2% | 1.9% |
| space1 | | | |
| Race | | | |
| | Nevada, MO | Calhoun, MO | United States |
| White | 91.7% | 85.3% | 59.4% |
| Black | 0.6% | 0.0% | 12.2% |
| Asian | 0.3% | 0.6% | 5.6% |
| Native American | 0.3% | 1.8% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.3% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 4.2% | 11.4% | 3.2% |
| Hispanic | 2.9% | 0.6% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Nevada, MO | Calhoun, MO | United States |
| Married Population | 43.3% | 41.2% | 49.8% |
| Currently Married | 39.7% | 37.1% | 48.0% |
| Married but Separated | 3.5% | 4.0% | 1.8% |
| Single Population | 56.7% | 58.8% | 50.2% |
| Never Married | 28.6% | 23.2% | 33.8% |
| Divorced | 17.4% | 25.4% | 10.8% |
| Widowed | 10.7% | 10.3% | 5.6% |
| space5 | | | |
| Household Size | 2.16 | 2.31 | 2.60 |
| Households | 3,458 | 141 | 124,010,992 |
| Family Households | 1,739 | 89 | 80,755,759 |
| Married couple, w/children | 22.2% | 9.0% | 30.5% |
| Married couple, no children | 44.4% | 44.9% | 42.9% |
| Non Family Households | 1,719 | 52 | 43,255,233 |
| Single householder, w/children | 27.0% | 21.3% | 15.8% |
| Single householder, no children | 6.4% | 24.7% | 10.8% |