| | Imperial, MO | Hilo, HI | United States |
| Population | 5,119 | 46,559 | 329,725,481 |
| Female Population | 48.0% | 51.3% | 50.5% |
| Male Population | 52.0% | 48.7% | 49.5% |
| Median Age | 38.1 | 39.9 | 38.4 |
| space3 | | | |
| Population - 2010 | 4,445 | 48,795 | 309,327,143 |
| Population - 2000 | 4,373 | 40,759 | 285,036,114 |
| Population - 1990 | 4,156 | 37,808 | 251,960,433 |
| Pop. 2000 to Now | 6.3% | 16.3% | 15.6% |
| Pop. 1990 to Now | 11.9% | 25.3% | 30.8% |
| space4 | | | |
| Population Density | 974.1 | 872.1 | 93.4 |
| Land Area | 5.3 | 53.4 | 3,531,905.4 |
| Water Area | 0.8 | 4.9 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Imperial, MO | Hilo, HI | United States |
| Age 0 to 4 | 6.0% | 4.3% | 5.9% |
| Age 5 to 9 | 8.4% | 6.5% | 6.1% |
| Age 10 to 14 | 6.8% | 7.2% | 6.6% |
| Age 15 to 17 | 9.2% | 3.9% | 3.9% |
| Age 18 to 20 | 2.3% | 4.1% | 4.0% |
| Age 21 to 24 | 3.7% | 4.9% | 5.2% |
| Age 25 to 34 | 7.3% | 13.1% | 13.8% |
| Age 35 to 44 | 15.6% | 11.9% | 12.9% |
| Age 45 to 54 | 14.2% | 10.2% | 12.6% |
| Age 55 to 59 | 7.1% | 5.5% | 6.7% |
| Age 60 to 64 | 3.8% | 7.7% | 6.3% |
| Age 65 to 74 | 10.5% | 11.3% | 9.6% |
| Age 75 to 84 | 4.4% | 5.9% | 4.5% |
| Age 85 and over | 0.9% | 3.6% | 1.9% |
| space1 | | | |
| Race | | | |
| | Imperial, MO | Hilo, HI | United States |
| White | 87.6% | 15.7% | 59.4% |
| Black | 0.5% | 0.7% | 12.2% |
| Asian | 0.6% | 31.1% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.3% | 10.5% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 5.8% | 29.2% | 3.2% |
| Hispanic | 5.3% | 12.8% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Imperial, MO | Hilo, HI | United States |
| Married Population | 51.9% | 45.2% | 49.8% |
| Currently Married | 50.3% | 43.6% | 48.0% |
| Married but Separated | 1.6% | 1.5% | 1.8% |
| Single Population | 48.1% | 54.8% | 50.2% |
| Never Married | 26.8% | 38.0% | 33.8% |
| Divorced | 15.6% | 10.1% | 10.8% |
| Widowed | 5.7% | 6.7% | 5.6% |
| space5 | | | |
| Household Size | 2.72 | 2.80 | 2.60 |
| Households | 1,877 | 16,189 | 124,010,992 |
| Family Households | 1,263 | 10,681 | 80,755,759 |
| Married couple, w/children | 37.4% | 24.5% | 30.5% |
| Married couple, no children | 40.4% | 42.6% | 42.9% |
| Non Family Households | 614 | 5,508 | 43,255,233 |
| Single householder, w/children | 14.4% | 18.7% | 15.8% |
| Single householder, no children | 7.8% | 14.1% | 10.8% |